// API callback
related_results_labels_thumbs({"version":"1.0","encoding":"UTF-8","feed":{"xmlns":"http://www.w3.org/2005/Atom","xmlns$openSearch":"http://a9.com/-/spec/opensearchrss/1.0/","xmlns$blogger":"http://schemas.google.com/blogger/2008","xmlns$georss":"http://www.georss.org/georss","xmlns$gd":"http://schemas.google.com/g/2005","xmlns$thr":"http://purl.org/syndication/thread/1.0","id":{"$t":"tag:blogger.com,1999:blog-4366728018987920734"},"updated":{"$t":"2023-12-10T15:39:28.372+05:30"},"category":[{"term":"CCNA (R\/S 200-120)"},{"term":"CCNP Switch(300-115 and 642-813)"},{"term":"CCNP Route(300-101 and 642-902}"},{"term":"Linux (RHEL6 \u0026 RHEL7)"},{"term":"CCNP TShoot 300-135"},{"term":"CCNA Security"},{"term":"CCNA (VOICE)"},{"term":"PFSense"}],"title":{"type":"text","$t":"Best Cisco CCNA CCNP and Linux\/CentOS PDF Notes"},"subtitle":{"type":"html","$t":"New Ccna (Routing and Switching 200-125 ) Ccna Security and Ccna Voice Best ever CCNP Route(300-101 and 642-902} and Switch and  \nalso Best RHCE\/RHCSA (Linux) notes for RHEL6 and RHEL 7 and \nAlso Ubuntu and PFSense Firewall PDF Notes"},"link":[{"rel":"http://schemas.google.com/g/2005#feed","type":"application/atom+xml","href":"http:\/\/www.ccnaccnplinux.com\/feeds\/posts\/default"},{"rel":"self","type":"application/atom+xml","href":"http:\/\/www.blogger.com\/feeds\/4366728018987920734\/posts\/default\/-\/CCNP+Switch%28300-115+and+642-813%29?alt=json-in-script\u0026max-results=8"},{"rel":"alternate","type":"text/html","href":"http:\/\/www.ccnaccnplinux.com\/search\/label\/CCNP%20Switch%28300-115%20and%20642-813%29"},{"rel":"hub","href":"http://pubsubhubbub.appspot.com/"},{"rel":"next","type":"application/atom+xml","href":"http:\/\/www.blogger.com\/feeds\/4366728018987920734\/posts\/default\/-\/CCNP+Switch%28300-115+and+642-813%29\/-\/CCNP+Switch%28300-115+and+642-813%29?alt=json-in-script\u0026start-index=9\u0026max-results=8"}],"author":[{"name":{"$t":"Unknown"},"email":{"$t":"noreply@blogger.com"},"gd$image":{"rel":"http://schemas.google.com/g/2005#thumbnail","width":"16","height":"16","src":"https:\/\/img1.blogblog.com\/img\/b16-rounded.gif"}}],"generator":{"version":"7.00","uri":"http://www.blogger.com","$t":"Blogger"},"openSearch$totalResults":{"$t":"40"},"openSearch$startIndex":{"$t":"1"},"openSearch$itemsPerPage":{"$t":"8"},"entry":[{"id":{"$t":"tag:blogger.com,1999:blog-4366728018987920734.post-9162948586730674839"},"published":{"$t":"2017-01-15T12:24:00.001+05:30"},"updated":{"$t":"2017-01-15T12:24:28.764+05:30"},"category":[{"scheme":"http://www.blogger.com/atom/ns#","term":"CCNP Switch(300-115 and 642-813)"}],"title":{"type":"text","$t":"Voice Vlan Configuration"},"content":{"type":"html","$t":"\u003Cdiv dir=\"ltr\" style=\"text-align: left;\" trbidi=\"on\"\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cimg src=\"https:\/\/1.bp.blogspot.com\/-NNzaxcdTa9g\/WHsaS2J242I\/AAAAAAAADqs\/kNjfJP5h3SIg4M64Tse3dIwH5CM0RYuqgCLcB\/s640\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BConfiguration00002.jpg\" \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;Now the we talked\nabout the theory of Voice Vlans, let’s take a look at how to configure them and\nremember that, there are 3 approaches we can do a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESingle Vlan Access Port that was the least Desirable\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E but in\nsome cases, we said we might need to do a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESingle\nVlan Access Port for both an IPPhone and attached PC\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, where\nsending traffic into the same Vlan\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; The second option was\na Multi-Vlan Access Port that a special type of Access Port where Cisco says “\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eyou can have two Vlans on a single Access Port if and if one\nof those Vlans is to decleared to be a Voice Vlan\u003C\/span\u003E\u003C\/u\u003E” and our third\noption was to \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ecreate a Trunk Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand we know that, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETrunk\nPorts can carry traffic for lots of Vlans\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Einfect, that could be a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Echallenge\nfor Security reason for Quality of Service reason\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we probably\ndon’t want that trunk between the Phone and the Wiring Switch carrying traffic\nfor all of our Vlans, really we wanna carrying traffic for couple of Vlans, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethe Voice Vlan of course to get the Phone\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif we do have an\nattached PC\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewant to be\ncarrying traffic for the Native Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eremember\nthat, the Native Vlan is the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVlan on a DOT1Q\ntrunk that does not have those 4 extra Tag Bytes\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E we call it an \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EUntagged Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ethat’s\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethe Vlan of PC attached to our IPPhone\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nfirst let’s see how to setup a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESingle Vlan Access\nPort and we gonna be using this topology on Picture\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-NNzaxcdTa9g\/WHsaS2J242I\/AAAAAAAADqs\/kNjfJP5h3SIg4M64Tse3dIwH5CM0RYuqgCLcB\/s1600\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BConfiguration00002.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"260\" src=\"https:\/\/1.bp.blogspot.com\/-NNzaxcdTa9g\/WHsaS2J242I\/AAAAAAAADqs\/kNjfJP5h3SIg4M64Tse3dIwH5CM0RYuqgCLcB\/s640\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BConfiguration00002.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;Notice we have \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Egot Laptop running a software based IP Phone\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand it’s \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eplugging into\ninterface fast Ethernet 1\/0\/10 on Switch SW1\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, how would we set\nup a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESingle Vlan Access Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nlet’s go into a global Configuration mode and\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"mso-list: l4 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config)#interface\nfastetherent 1\/0\/10\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"mso-list: l4 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-if)#switchport\nmode access\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"mso-list: l4 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-if)#switchport\naccess vlan 300\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; But \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe said that with a Single Vlan Access Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eif maybe \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe had third\nparty IP Phone that was Plugin to this type of Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EThird Party\nPhone did not support the concept of Voice Vlan having a Phone to send traffic\nto one Vlan and attached PC sending traffic to different Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nwe said that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eeven though we could not get the\nVlan separation\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethere was still a\nway if the Phone or the software PC supported it\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003Ci\u003E\u003Cu\u003Eto give Priority marking to that Voice traffic, it was\na DOT1P marking\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E, it’s very simple to set that up, we simply say\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l2 level1 lfo2; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-if)#switchport\nvoice vlan dot1p\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; We are \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Esaying if any traffic comes in with a DOT1P tag,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ethat traffic is part of our Vlan \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVoice Vlan and the Priority marking can be embedded inside of\nthose Tag Bytes,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Elet’s setup another\nport fastetherent 1\/0\/11, let’s \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eset it up as a\nMulti-Vlan Access Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we go into an interface\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-NNzaxcdTa9g\/WHsaS2J242I\/AAAAAAAADqs\/kNjfJP5h3SIg4M64Tse3dIwH5CM0RYuqgCLcB\/s1600\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BConfiguration00002.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"260\" src=\"https:\/\/1.bp.blogspot.com\/-NNzaxcdTa9g\/WHsaS2J242I\/AAAAAAAADqs\/kNjfJP5h3SIg4M64Tse3dIwH5CM0RYuqgCLcB\/s640\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BConfiguration00002.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12pt; line-height: 107%; text-indent: -0.25in;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003Cb style=\"text-indent: -0.25in;\"\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config)#interface\nfastetherent 1\/0\/11\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12pt; line-height: 107%; text-indent: -0.25in;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003Cb style=\"text-indent: -0.25in;\"\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-if)#switchport mode\naccess\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003ENow we can specify the two different\nVlan’s that can be on that Port, that Data Vlan another words the Access Vlan\nand the Voice Vlan\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"mso-list: l0 level1 lfo3; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-if)#switchport\naccess vlan 300\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"mso-list: l0 level1 lfo3; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-if)#switchport\nvoice vlan 400\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; How does \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethe Phone know that it’s the Voice Vlan,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eif we using \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EMulti-Vlan\nAccess Port Configuration CDP specifically CDPv2 is going to tell the attached\nPhone\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ehere is your Voice Vlan you\nbelong to Vlan 400\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E” now when that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EPhone\nboots up and it does a DHCP Request out on the network to get it’s IP Address\nand other information\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebut the way\nthe \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EPhone knows how to make a DHCP Request thanks\nto CDP Version 2\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ewe said\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E, if we are not running CDP though if we running LLDP-Med\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nthis was not an option for instead \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe need to\nhave a trunk Connection between our Switch and IP Phone\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, let’s\nsee how to set that up using \u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"mso-list: l3 level1 lfo4; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config)#interface\nfastetherent 1\/0\/12\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"mso-list: l3 level1 lfo4; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-if)#switchport\ntrunk encapsulation dot1q\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"mso-list: l3 level1 lfo4; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-if)#switchport\nmode trunk\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Now the we said \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethis Port is a trunk we need to define what the Native Vlan remember\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nthe \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ENative Vlan that’s the Vlan in to which PC\nwould belong\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif we had a PC\nplugged into that IP Phone and we can specify that Vlan which is going to be\nVlan 300 in our Case for the Data Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we can specify that with\na command\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l1 level1 lfo5; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-if)#switchport\ntrunk native vlan 300\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003ENow let’s specify the Voice Vlan\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l1 level1 lfo5; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-if)#switchport\nvoice vlan 400\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; And this Configuration by\nitself would work however, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe now have a trunk\nbetween this Cisco Catalyst Switch and the IP Phone\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E and that\ntrunk by default is gonna be \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ecarrying traffic for\nall of the Vlan we probably don’t want\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ethat\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Elet’s do Prun off the unneeded Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nremember our discussion of Vlan Pruning on Trunks\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l1 level1 lfo5; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-if)#switchport\ntrunk allowed 300,400\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-4-7EBrMzvP8\/WHsapOkLeQI\/AAAAAAAADqw\/eqA4bGLuGAU9qi7gamlwG4ipKAOSozMkACLcB\/s1600\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BConfiguration00003.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"338\" src=\"https:\/\/1.bp.blogspot.com\/-4-7EBrMzvP8\/WHsapOkLeQI\/AAAAAAAADqw\/eqA4bGLuGAU9qi7gamlwG4ipKAOSozMkACLcB\/s640\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BConfiguration00003.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; We have \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Enow configured 3 different Ports to connect out IP Phones\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand if we want to \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Everify\nthe configuration one of those ports\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, let’s do fastetherent\n1\/0\/11 of an example\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l1 level1 lfo5; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1#show interfaces\nfastethernet 1\/0\/11 switchport\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-52OwI_E_glA\/WHsaxVVIYKI\/AAAAAAAADq0\/o2IL0KQoXYQH34boX87GZSj8gm_fL1pBACLcB\/s1600\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BConfiguration00004.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"252\" src=\"https:\/\/2.bp.blogspot.com\/-52OwI_E_glA\/WHsaxVVIYKI\/AAAAAAAADq0\/o2IL0KQoXYQH34boX87GZSj8gm_fL1pBACLcB\/s640\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BConfiguration00004.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; This is gonna \u003Ci\u003E\u003Cu\u003Egive\nus information such as what kind of port is this\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe can see this is an Access Vlan or the Data Vlan of 300\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ethat’s \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Enot going to\nhave any Tags on it\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, and we \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Egot a\nVlan of 400 that’s the Voice Vlan it will be tagged\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethe Voice frames have 4 extra Bytes added.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cbr \/\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Cspan style=\"line-height: 107%;\"\u003E\u003Cspan style=\"color: blue; font-family: Trebuchet MS, sans-serif; font-size: x-large;\"\u003E\u003Cu\u003E\u003Ci\u003E\u003Ca href=\"https:\/\/drive.google.com\/open?id=0Bxhcn6La3ysgVUg4eVg4WmZLS0E\" target=\"_blank\"\u003EClick Here To Download The PDF File\u003C\/a\u003E\u003C\/i\u003E\u003C\/u\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u003Cbr \/\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"background-color: #faf7f7; color: #444444; font-family: \u0026quot;trebuchet ms\u0026quot;, sans-serif; font-size: 16px; margin: 0px; padding: 0px;\"\u003E\n\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; If You Like the Post. Don’t forget\u0026nbsp;\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"background-color: #faf7f7; color: #444444; font-family: \u0026quot;trebuchet ms\u0026quot;, sans-serif; font-size: 16px; margin: 0px; padding: 0px;\"\u003E\n\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"background-color: #faf7f7; color: #444444; font-family: \u0026quot;trebuchet ms\u0026quot;, sans-serif; font-size: 16px; margin: 0px; padding: 0px;\"\u003E\n\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp;\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003Eto\u0026nbsp;“\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: #0070c0; font-size: 18pt; margin: 0px; padding: 0px;\"\u003ESubscribe\/Share\/Comment\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003E”. Thank You.\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003C\/div\u003E\n"},"link":[{"rel":"replies","type":"application/atom+xml","href":"http:\/\/www.ccnaccnplinux.com\/feeds\/9162948586730674839\/comments\/default","title":"Post Comments"},{"rel":"replies","type":"text/html","href":"http:\/\/www.ccnaccnplinux.com\/2017\/01\/voice-vlan-configuration.html#comment-form","title":"3 Comments"},{"rel":"edit","type":"application/atom+xml","href":"http:\/\/www.blogger.com\/feeds\/4366728018987920734\/posts\/default\/9162948586730674839"},{"rel":"self","type":"application/atom+xml","href":"http:\/\/www.blogger.com\/feeds\/4366728018987920734\/posts\/default\/9162948586730674839"},{"rel":"alternate","type":"text/html","href":"http:\/\/www.ccnaccnplinux.com\/2017\/01\/voice-vlan-configuration.html","title":"Voice Vlan Configuration"}],"author":[{"name":{"$t":"Unknown"},"email":{"$t":"noreply@blogger.com"},"gd$image":{"rel":"http://schemas.google.com/g/2005#thumbnail","width":"16","height":"16","src":"https:\/\/img1.blogblog.com\/img\/b16-rounded.gif"}}],"media$thumbnail":{"xmlns$media":"http://search.yahoo.com/mrss/","url":"https:\/\/1.bp.blogspot.com\/-NNzaxcdTa9g\/WHsaS2J242I\/AAAAAAAADqs\/kNjfJP5h3SIg4M64Tse3dIwH5CM0RYuqgCLcB\/s72-c\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BConfiguration00002.jpg","height":"72","width":"72"},"thr$total":{"$t":"3"}},{"id":{"$t":"tag:blogger.com,1999:blog-4366728018987920734.post-5574841586642758858"},"published":{"$t":"2017-01-11T19:13:00.000+05:30"},"updated":{"$t":"2017-01-11T19:13:16.072+05:30"},"category":[{"scheme":"http://www.blogger.com/atom/ns#","term":"CCNP Switch(300-115 and 642-813)"}],"title":{"type":"text","$t":"Voice Vlan Theory"},"content":{"type":"html","$t":"\u003Cdiv dir=\"ltr\" style=\"text-align: left;\" trbidi=\"on\"\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cimg src=\"https:\/\/3.bp.blogspot.com\/-Gf57MjYd29M\/WHYz3K9jUNI\/AAAAAAAADp8\/n_wRTGkbxFs-85ry1qHzzptnJ7i7MZkmgCLcB\/s640\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BTheory00009.jpg\" \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;Well we are on the topic of\nVlans and Trunks, i wanna tell you about the Special type of Vlan, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit’s a Voice Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E let’s imagine that we have a\nsituation like we have depicted on Picture \u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-udKq5VwsTvY\/WHYy6EtNw2I\/AAAAAAAADpY\/o6_QK7qJhnoDiEs_Z-tDeawPyzJv37YqQCLcB\/s1600\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BTheory00002.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"372\" src=\"https:\/\/2.bp.blogspot.com\/-udKq5VwsTvY\/WHYy6EtNw2I\/AAAAAAAADpY\/o6_QK7qJhnoDiEs_Z-tDeawPyzJv37YqQCLcB\/s640\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BTheory00002.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; Maybe we \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ereplacing Traditional IP Telephony PBX Phones with IP Phones\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethese IP Phones they are Ethernet devices they\nplug into that RJ45 Connector in the wall\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebut if a particular office and Cubical only had one Ethernet Connection\nto start with and we had a PC, we have a Laptop plugged into that Connection\nand \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Enow suddenly we adding a Phone that means we\nhave to put Switch in this office to accommodate another Ethernet Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Well the great news is \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Emany of our Cisco IP Phones have a Port on the back labeled\nPC Port and it allows us to sort of Daisy chain\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EPC into the Phone then go into the Wall\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethe Phone itself is acting as a little Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E its\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Etechnically 3 Ports Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"margin-left: 47.7pt; mso-add-space: auto; mso-list: l0 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EOne Ports goes to the Wall\nJack\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"margin-left: 47.7pt; mso-add-space: auto; mso-list: l0 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EOne Port goes to the\ninternal workings Phone itself and \u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"margin-left: 47.7pt; mso-add-space: auto; mso-list: l0 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EThis other Port can connect\nto this PC\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; We \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Edon’t have to run additional cabling we don’t have to add an\nanother Switch into that office\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EPhone will handle that for us\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, and notice what’s\nhappening here the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EPC that attached to the Phone\ngets to be in a different Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, here on i am saying that the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ELaptop is in Vlan 300 Data Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EPhone is in\nVlan 400 a Voice Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, and that’s gonna give us some benefits \u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit’s gonna give us performance benefits\u003C\/span\u003E\u003C\/u\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Efor one thing by having \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVlan’s Separation\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E if we had a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ebig Broadcast Storm on the Data Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E that’s not going to\nnegatively impact the Voice Vlan and it could also help out from a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESecurity prospective somebody not gonna able to attach a\nnetwork sniffer to the network and start sniffing Voice packets\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ethat’s the idea behind a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVoice Vlan we have a Separate Subnet for Voice traffic\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nand there are different ways of we can set up.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-5CmpjWUmv3U\/WHYzHbNqraI\/AAAAAAAADpk\/0jHI5xXj4pgrLjEI3f90_2lyLIWhYgRWQCLcB\/s1600\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BTheory00003.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"372\" src=\"https:\/\/3.bp.blogspot.com\/-5CmpjWUmv3U\/WHYzHbNqraI\/AAAAAAAADpk\/0jHI5xXj4pgrLjEI3f90_2lyLIWhYgRWQCLcB\/s640\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BTheory00003.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;This Port into which the Phone\nis connecting into the Switch it could be a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESingle\nVlan Access Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, in which case the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EPC and the Phone would be a member of the Same Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand that’s the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eleast Desirable\nof this option\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eby the way.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Another option is it can be\nconnected into a Special type of \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EAccess Port in\nMulti-Vlan access Port or it can connect into a Trunk Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eknow the Trunk can carry traffic for Multiple Vlan’s\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nand that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETrunk between the Phone and Switch could\ncarry traffic for the Voice Vlan and the Data Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E let’s take a\nlook at these one at a time beginning with the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESingle\nVlan Access Port.\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; With the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESingle Vlan Access Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ethat Port into which that Phone is connected, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit is an Access Port and like most Access Ports are\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eit is \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Econfigured for\nonly 1 Vlan meaning that the Phone and the PC are the member of the same Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\nit doesn’t seem like this giving us much more benefits does it, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewhen would we use such a thing?\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Well maybe we were \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eusing a non-Cisco IP Phone that doesn’t support the concept\nof Voice Vlan \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Eor maybe we have a Software based Client on our\nLaptop on or PC\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E, maybe its Zebra Client maybe its\nCisco IP Communicator\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E but if it’s the same device that’s acting\nas a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EData Device and the Voice device then we\nmight need to use a Single Vlan access Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ehowever, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eeven though we\ndoing that we still can get some Quality of Service benefits from this\nConfiguration\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-6hvq8vJfjYM\/WHYzPDR-XSI\/AAAAAAAADpo\/a20SUXDXr3Ad47bivh0T6tW4CQgcAuo0wCLcB\/s1600\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BTheory00005.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"372\" src=\"https:\/\/1.bp.blogspot.com\/-6hvq8vJfjYM\/WHYzPDR-XSI\/AAAAAAAADpo\/a20SUXDXr3Ad47bivh0T6tW4CQgcAuo0wCLcB\/s640\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BTheory00005.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;Remember when we were talking\nabout an 802.1Q Trunk, we mentioned that except for the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ENative Vlan the other Vlans had 4 Bytes added to their frame\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Einside of 4 Bytes\nwe had 3 bits called the Priority bits\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethose 3 bits could be used to indicate the\nPriority of our frame\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand with \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E3 bits to work with that gave us 8 Possible values of\nPriority because 2\u003Csup\u003E3\u003C\/sup\u003E=8\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E but Cisco says \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Edo not use values of 6 and 7 those are reserved for Network\nuse\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we can only \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Euse values for\nProduction traffic and the range of 0-5,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E\n\u003C\/span\u003Eand that’s the value to which \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVoice frames\nshould be set they should have a marking a COS a Class of Service marking of 5\non a DOT1Q trunk\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Egreat news is Cisco IP Phone do that for us by default, and\nwe enable DOT1P\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E on our Switch even \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethough we have a single Vlan, it can still accept frames that come in that\nhave 4 extra Bytes and this is not a Trunk\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E but \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif we enable the Port for DOT1P\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-9gduTYjon8g\/WHYzbwiqhlI\/AAAAAAAADps\/MfbXRgXOiysHBftLYDyBodINLZTl8W90gCLcB\/s1600\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BTheory00006.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"372\" src=\"https:\/\/1.bp.blogspot.com\/-9gduTYjon8g\/WHYzbwiqhlI\/AAAAAAAADps\/MfbXRgXOiysHBftLYDyBodINLZTl8W90gCLcB\/s640\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BTheory00006.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp;\u003Cu\u003EIt will\naccept the frame that looks similar to a Trunk frames\u003C\/u\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E and i say similar because \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit still going to have 4 extra Bytes added inside of the 4\nBytes\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, there are \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E3 Bits that are\ngonna be used to mark the Priority marking but we called this a DOT1P marking\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EWhat’s the difference\nbetween DOT1P marking and regular COS marking that we would have on a DOT1Q\nTrunk?\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Well a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EDOT1Q trunk uses 12 bits in those 4 Bytes to indicate a Vlan\nID\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EDOT1P does not do that DOT1P\nis not tagging a frame\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E it belonging to a particular Vlan, infect\nif you were take a look at these \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ebits representing\nthe Vlan Field\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, they would \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eall be\nthe set to 0,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ethat’s the big\ndifference between a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EDOT1P marking and a COS\nmarking\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ewhich is \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Epart of DOT1Q Trunk\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand\nwe see on few movement how to configure that Switchport to accept DOT1P marking\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-NBHPZ9henl4\/WHYzknlu1dI\/AAAAAAAADpw\/VpvidR2x1fAslTcI93QwOxdbLYDVfsDLwCLcB\/s1600\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BTheory00007.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"372\" src=\"https:\/\/1.bp.blogspot.com\/-NBHPZ9henl4\/WHYzknlu1dI\/AAAAAAAADpw\/VpvidR2x1fAslTcI93QwOxdbLYDVfsDLwCLcB\/s640\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BTheory00007.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;Another option we have is to configure the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESwitchport as a Multi-Vlan Access Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, Cisco gives an\nexception here, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ECisco says we can have a couple\nof Vlans appearing on an Access Port if and only, if we say that one of those\nVlans is a Voice Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, what a great solution this way \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe can go to this Port and plug in a Laptop and it’s gonna\njust fine like an Access Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebecause\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit is an Access Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebut if we have a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EPhone\nplugged in maybe we got a PC plugged into that Phone\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EPhone will automatically learn that it belong to the Voice\nVlan and the PC is belong the a Data Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E \u003Ci\u003E\u003Cu\u003Ehow does this\nwork?\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Like we said \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethis truly is an Access Port\u003C\/span\u003E,\u003C\/u\u003E\u003C\/i\u003E we set the\nSwitchport Mode to Access Port however, it \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ecan\nsupport two Vlans if\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ewe say \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eone of those Vlans is an Access Vlan or Data Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eother Vlan is\nthe Voice Vlan,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ethe way Phone\nlearns which \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVlan is the Voice Vlan is thanks to\nCDP\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ECisco Discovery Protocol,\nthe Switch is going to send a CDP message\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E by the way \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit has to be CDP Version 2 this doesn’t work with CDP Version\n1\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebut the Switch is gonna send a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ECDP Version 2 message to the Phone\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E to say “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ehere is your Voice Vlan and now when the Phone sends out a\nDHCP Request\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E to get it’s I\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EP\nAddress and Subnet Mask and it’s Default Gateway and IP Address of TFTP Server\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\nthat it needs, when it does that it \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Enot gonna be\nable to do that as a member of appropriate Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, it’s gonna be\nasking for an \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EIP Address belonging to in this\ncase Vlan 400\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-MUz_XszrzUE\/WHYzuzScf4I\/AAAAAAAADp0\/F0I4qydOHEo_pIYpoLBikH6ZzF8jDyvTACLcB\/s1600\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BTheory00008.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"372\" src=\"https:\/\/1.bp.blogspot.com\/-MUz_XszrzUE\/WHYzuzScf4I\/AAAAAAAADp0\/F0I4qydOHEo_pIYpoLBikH6ZzF8jDyvTACLcB\/s640\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BTheory00008.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; Remember we talk earlier\nabout \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ECDP the Cisco Discovery Protocol vs LLDP\nthe Link Layer Discovery Protocol\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, this approach of \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ehaving a Multi-Vlan Access Port this does not work with\nLLDP-Med, Link Layer Discovery Layer Protocol-Media Endpoint Discovery\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-Gf57MjYd29M\/WHYz3K9jUNI\/AAAAAAAADp8\/n_wRTGkbxFs-85ry1qHzzptnJ7i7MZkmgCLcB\/s1600\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BTheory00009.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"372\" src=\"https:\/\/3.bp.blogspot.com\/-Gf57MjYd29M\/WHYz3K9jUNI\/AAAAAAAADp8\/n_wRTGkbxFs-85ry1qHzzptnJ7i7MZkmgCLcB\/s640\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BTheory00009.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp;\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EIf we relying on LLDP, instead of CDP\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ewe can only run one or other on your Switch then the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EPhone is not automatically learn it’s Vlan assignments gonna\nbe able to\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, if we have a situation like \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethat if we using LLDP-Med we should probably make that Port a\nTrunk Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand we talk about that\nin just a movement \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif we are using CDP this is\ngreat way\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eto go and we do a\nPacket Capture on frame \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EFlowing between that Phone\nand that Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit would look like\na DOT1Q trunk frame\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, infect i were to use a Packet Capturing say\n“\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ecan you tell me, is this frame going into a\nMulti-Vlan Access Port or it’s going into a Trunk Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E” you\nwould not able to tell me difference because \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit\nis identical to a Trunk frame\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethat\nwe would find on a DOT1Q Trunk\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-zqwAQp3i8rc\/WHYz-eJ-1CI\/AAAAAAAADqA\/CtbRW-kQZ8M7ECsGTntitV8Al3eS82EHACLcB\/s1600\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BTheory00010.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"372\" src=\"https:\/\/1.bp.blogspot.com\/-zqwAQp3i8rc\/WHYz-eJ-1CI\/AAAAAAAADqA\/CtbRW-kQZ8M7ECsGTntitV8Al3eS82EHACLcB\/s640\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BTheory00010.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;It \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Especifically frame coming from the Phone are going to be\ntagged\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethey are going to have\nthose 4 extra Bytes and those 4 extra Bytes do \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Econtain a Vlan Tag in this Case Vlan 400 we gonna have 3 bits\non those Bytes they gonna marked the COS Class of Service Priority marking for\nPhones traffic\u003C\/span\u003E\u003C\/u\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EPhone automatically sets those to a COS of 5\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\nand remember on \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EDOT1Q Trunk we have 1 Vlan that\nwe say it’s Untagged Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, well \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethe\nData Vlan in this case is gonna be untagged Vlan the PC’s frame is going into\nthe Switch they do not have these extra 4 Bytes\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, those are 2\noptions for connecting an IP Phone to our Cisco Catalyst Switch, let’s take a\nlook at another option.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u0026nbsp;\u0026nbsp;And that other \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eoption\nis to use a Trunk Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand in\nthis case \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethe Port is a Trunk Port that’s gonna\nbe a DOT1Q Trunk Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand we know\nthat, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethe Trunk can carry traffic for Multiple\nVlans and if we already using LLDP-Med or we using CDP this is gonna be compatible\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebecause we are not using that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESpecial exception Cisco gives us for a Multi-Vlan Access Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eframes truly\nare DOT1Q Trunk frames they look identical frames\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebut \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ehere we do\ntechnically have a Trunk the switchport itself is configured in a Trunk Mode\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebut that in self brings up bit a challenge because \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethink about for movement by default traffic for what Vlan’s\nflow over a Trunk?\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-zwUScNY1AfY\/WHY0G30yhwI\/AAAAAAAADqE\/rCpvy5PXESMis5T4vSpNj3K7PAvuv1J9wCLcB\/s1600\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BTheory00011.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"372\" src=\"https:\/\/4.bp.blogspot.com\/-zwUScNY1AfY\/WHY0G30yhwI\/AAAAAAAADqE\/rCpvy5PXESMis5T4vSpNj3K7PAvuv1J9wCLcB\/s640\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BTheory00011.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; And the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eanswer is all of our Vlans\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ethat means\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"mso-list: l1 level1 lfo2; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EThat depending on how you have your\nPhone setup\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"mso-list: l1 level1 lfo2; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EYou could have in some cases\ndepending on your Phone Model\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"mso-list: l1 level1 lfo2; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EDepending on your Configuration \u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; But in some cases, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eyou could have the attached PC, attached Laptop runs some\nsort of Packet Capture utility and capture traffic not just for Data Vlan but\nfor all the Vlans appearing on that Trunk\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eyou could see \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eunknow uncast frames,\nbroadcast and multicast frames\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Efrom\na \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Esecurity prospective that’s not good\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Etherefore \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ECisco\nstrongly advises though as to Prun off any unneeded Vlans from that Trunk\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\n\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-MaJ8dWesGGc\/WHY0SKOilnI\/AAAAAAAADqI\/VhyV_0C35w0jgtsOTR9LtACgzzoq4nmVgCLcB\/s1600\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BTheory00012.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"372\" src=\"https:\/\/2.bp.blogspot.com\/-MaJ8dWesGGc\/WHY0SKOilnI\/AAAAAAAADqI\/VhyV_0C35w0jgtsOTR9LtACgzzoq4nmVgCLcB\/s640\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BTheory00012.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EThose are the 3 option for\nconnecting and IP Phone into the Switch, that the look at the Theory of Voice\nVlans.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003E\u003Cbr \/\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EIn our next session, we\nwanna see how to Configure Voice Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003E\u003Cbr \/\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"line-height: 107%;\"\u003E\u003Cspan style=\"color: blue; font-family: Trebuchet MS, sans-serif; font-size: x-large;\"\u003E\u003Ca href=\"https:\/\/drive.google.com\/open?id=0Bxhcn6La3ysgR1NYZFFYMXp3YVk\" target=\"_blank\"\u003EClick Here To Download The PDF File\u003C\/a\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"background-color: #faf7f7; color: #444444; font-family: \u0026quot;trebuchet ms\u0026quot;, sans-serif; font-size: 16px; margin: 0px; padding: 0px;\"\u003E\n\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;If You Like the Post. Don’t forget\u0026nbsp;\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"background-color: #faf7f7; color: #444444; font-family: \u0026quot;trebuchet ms\u0026quot;, sans-serif; font-size: 16px; margin: 0px; padding: 0px;\"\u003E\n\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"background-color: #faf7f7; color: #444444; font-family: \u0026quot;trebuchet ms\u0026quot;, sans-serif; font-size: 16px; margin: 0px; padding: 0px;\"\u003E\n\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp;\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003Eto\u0026nbsp;“\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: #0070c0; font-size: 18pt; margin: 0px; padding: 0px;\"\u003ESubscribe\/Share\/Comment\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003E”. Thank You.\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003C\/div\u003E\n"},"link":[{"rel":"replies","type":"application/atom+xml","href":"http:\/\/www.ccnaccnplinux.com\/feeds\/5574841586642758858\/comments\/default","title":"Post Comments"},{"rel":"replies","type":"text/html","href":"http:\/\/www.ccnaccnplinux.com\/2017\/01\/voice-vlan-theory.html#comment-form","title":"0 Comments"},{"rel":"edit","type":"application/atom+xml","href":"http:\/\/www.blogger.com\/feeds\/4366728018987920734\/posts\/default\/5574841586642758858"},{"rel":"self","type":"application/atom+xml","href":"http:\/\/www.blogger.com\/feeds\/4366728018987920734\/posts\/default\/5574841586642758858"},{"rel":"alternate","type":"text/html","href":"http:\/\/www.ccnaccnplinux.com\/2017\/01\/voice-vlan-theory.html","title":"Voice Vlan Theory"}],"author":[{"name":{"$t":"Unknown"},"email":{"$t":"noreply@blogger.com"},"gd$image":{"rel":"http://schemas.google.com/g/2005#thumbnail","width":"16","height":"16","src":"https:\/\/img1.blogblog.com\/img\/b16-rounded.gif"}}],"media$thumbnail":{"xmlns$media":"http://search.yahoo.com/mrss/","url":"https:\/\/3.bp.blogspot.com\/-Gf57MjYd29M\/WHYz3K9jUNI\/AAAAAAAADp8\/n_wRTGkbxFs-85ry1qHzzptnJ7i7MZkmgCLcB\/s72-c\/www.ccnaccnplinux.com%2BVoice%2BVlan%2BTheory00009.jpg","height":"72","width":"72"},"thr$total":{"$t":"0"}},{"id":{"$t":"tag:blogger.com,1999:blog-4366728018987920734.post-4964668336152575948"},"published":{"$t":"2017-01-06T19:15:00.001+05:30"},"updated":{"$t":"2017-01-06T19:22:25.200+05:30"},"category":[{"scheme":"http://www.blogger.com/atom/ns#","term":"CCNP Switch(300-115 and 642-813)"}],"title":{"type":"text","$t":"VTP Configuration"},"content":{"type":"html","$t":"\u003Cdiv dir=\"ltr\" style=\"text-align: left;\" trbidi=\"on\"\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Cb style=\"text-align: left;\"\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u003Cimg src=\"https:\/\/1.bp.blogspot.com\/-bWFaKVh9LJY\/WG-ZiibPA-I\/AAAAAAAADms\/4IRkOIGo2OA-F-VLLLMooQgAVOp8xi3sgCLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00003.jpg\" \/\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Cb style=\"text-align: left;\"\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp;\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Cb style=\"text-align: left;\"\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003ENow the we \u003Ci\u003E\u003Cspan style=\"color: red;\"\u003Etalked about the theory of VTP\u003C\/span\u003E\u003C\/i\u003E,\nlet’s see how to set it up in this topology\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Cb style=\"text-align: left;\"\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u003Cbr \/\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-EC0MaepI-5M\/WG-ZP_yX_xI\/AAAAAAAADmo\/hQDM7CjzEVsU3-IjHJe6XGk482vrk53wgCLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00002.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"250\" src=\"https:\/\/4.bp.blogspot.com\/-EC0MaepI-5M\/WG-ZP_yX_xI\/AAAAAAAADmo\/hQDM7CjzEVsU3-IjHJe6XGk482vrk53wgCLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00002.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; We\nalready \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ecreated a Trunk links between Sw1 and Sw2\nand also between Sw1 and Sw3\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, now let’s configure VTP on all of\nthe switches such that, if we were to add a Vlan let’s say the Switch Sw1, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethat newly created Vlan would be advertised over these Trunk\nlinks and that newly created Vlan would be learned by the other Switches\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\nin this example, let’s say that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESw1 and Sw2 are\ngonna be in a Server Mode and Sw3 is gonna be a Client Mode,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Elet’s begin our Configuration on Switch Sw1, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Efirst let’s set Sw1 to Server Mode\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand maybe it already be in a Server mode let’s just\nconfirm that and by being in \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EServer Mode we gonna\nbe able to make changes to our local Vlan Database\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, let’s go to\nGlobal Configuration mode an say\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l7 level1 lfo23; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config)#vtp\nmode server\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003ENext let’s set the VTP Domain name, this is the Case-sensitive\nDomain name.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l23 level1 lfo22; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config)#vtp\ndomain VTPDEMO\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003EAnd also, set the Password, we can do that by\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l21 level1 lfo21; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config)#vtp\npassword S3cret\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp; \u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;It might also be a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Egood idea to turn on VTP Pruning\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E remember what\nthat does, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit’s says if the far end Switch\ndoesn’t have any ports belonging to a particular Vlan, there is no need to send\ntraffic for that Vlan over the Trunk\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, however \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif we make a change to that far end Switch, maybe we do\nassign a port to that Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, VTP is gonna \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Erecognize dynamically and start sending traffic for that Vlan\nover the Trunk\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVlan is no\nlonger gonna be Pruned, it truly simple to set this up\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we just\nsay\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l10 level1 lfo20; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config)#vtp\npruning\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; And \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Elet’s also hard code the Version of VTP that we want to run\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nalthough we have \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVersions of 1, 2 and 3 available\nmany of our new higher end Switches\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we might have some \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESwitches on network that only support Versions 1 and 2\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Well the\ngood news is \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVersion 3 is backwards compatible\nwith Version 2 \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Ebut personally i like to keep things \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Econsistent and i am just gonna configure these Switches for\nVTP Version 2\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we can do that by \u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l24 level1 lfo19; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config)#vtp\nversion 2\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-bWFaKVh9LJY\/WG-ZiibPA-I\/AAAAAAAADms\/4IRkOIGo2OA-F-VLLLMooQgAVOp8xi3sgCLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00003.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"344\" src=\"https:\/\/1.bp.blogspot.com\/-bWFaKVh9LJY\/WG-ZiibPA-I\/AAAAAAAADms\/4IRkOIGo2OA-F-VLLLMooQgAVOp8xi3sgCLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00003.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l24 level1 lfo19; text-indent: -.25in;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003E\u003Cbr \/\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003ELet’s take\na look at the VTP configuration that we now have on Switch Sw1, to do that we\ngonna give the command.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l14 level1 lfo18; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1#show\nvtp status\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; This\nis the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Emain command we use when we dealing Verification\nand Troubleshooting of VTP, \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Eit show that this \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESwitch is capable of running VTP Versions 1 or 2 or\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003E3 but \u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"mso-list: l14 level1 lfo18; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003ECurrently\nthe Version that were running is \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVersion 2\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"mso-list: l14 level1 lfo18; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003EOur Domain\nname is a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVTPDEMO\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"mso-list: l14 level1 lfo18; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EPruning\nis currently enabled\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"mso-list: l14 level1 lfo18; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp;Notice that we have a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EHash Digest for the password we configured it’s an MD5 Hash\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Erather than the Plain text password, that’s probably\ngood thing\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"mso-list: l14 level1 lfo18; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp;we can also see our \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ECurrent Configuration Revision Number it’s 1\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"mso-list: l14 level1 lfo18; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp;And the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Enumber of\nExisting Vlans we have right now 7\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-KjJ848csRMU\/WG-ZxTBR5TI\/AAAAAAAADmw\/-1BGeGTo8AISnROI7rOgeZNNGQfpM2f2ACLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00004.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"336\" src=\"https:\/\/1.bp.blogspot.com\/-KjJ848csRMU\/WG-ZxTBR5TI\/AAAAAAAADmw\/-1BGeGTo8AISnROI7rOgeZNNGQfpM2f2ACLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00004.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"mso-list: l14 level1 lfo18; text-indent: -.25in;\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E\u003Cbr \/\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003ENow let’s\nperform an identical configuration on Switch Sw2\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003ELet’s go to\nSwitch Sw2\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"mso-list: l2 level1 lfo16; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw2(config)#vtp\nmode Server\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"mso-list: l2 level1 lfo16; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw2(config)#vtp\ndomain VTPDEMO\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"mso-list: l2 level1 lfo16; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw2(config)#vtp\npassword S3cret\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"mso-list: l2 level1 lfo16; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw2(config)#vtp\npruning\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003EWill make\nsure that our Version is Version 2\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"mso-list: l4 level1 lfo17; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw2(config)#vtp\nversion 2\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Let’s\ngo our Switch Sw3 now and do a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Enearly identical Configuration\nbut the difference is let’s make Switch Sw3 a Client Mode Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nwe going to go to \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EGlobal Configuration Mode and\nlet’s set the VTP mode to Client\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"mso-list: l3 level1 lfo15; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw3(config)#vtp\nmode client\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"mso-list: l3 level1 lfo15; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw3(config)#vtp\ndomain VTPDEMO\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"mso-list: l3 level1 lfo15; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw3(config)vtp\npassword S3cret\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Let’s\ngo back to Switch Sw1 and create a new Vlan and see that i newly created Vlan\ngets advertised over to Switches Sw2 and Sw3, let’s go to Global Configuration\nMode and say\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"mso-list: l15 level1 lfo14; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config)#vlan\n300\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"mso-list: l15 level1 lfo14; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-vlan)#name\nVTP_TEST\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"mso-list: l15 level1 lfo14; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-vlan)#exit\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003ENow take a look at our local Vlan database\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l19 level1 lfo13; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1#show\nvlan brief\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-l5_JI80BEIg\/WG-aICRZz-I\/AAAAAAAADnA\/MSU_VGwUeacnlMGX4QdcMXWtaDFsT9eggCLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00005.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"354\" src=\"https:\/\/2.bp.blogspot.com\/-l5_JI80BEIg\/WG-aICRZz-I\/AAAAAAAADnA\/MSU_VGwUeacnlMGX4QdcMXWtaDFsT9eggCLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00005.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp;\u0026nbsp;And we can see that we have Vlan’s 100, 200\nand 300 that we created, no surprise that Vlan 300 is showing up because we\ncreated on this Switch\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003ELet’s also see for our Configuration Revision Number\ngot incremented when we did that\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l12 level1 lfo12; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1#show\nvtp status\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; And\njust a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Emovement ago our Configuration Revision\nnumber was 1,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003Ci\u003E\u003Cu\u003Enow it’s 2 we added\na Vlan and that incremented the Configuration Revision Number by 1\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E,\nlet’s make sure that the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESwitches Sw2 and Sw3\nknow about the this newly created Vlan 300 (VTP_TEST)\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003ELet’s go\nover Switch Sw2 and do a\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l1 level1 lfo11; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw2#show\nvlan brief\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-t_mve6zhLT4\/WG-aT1fqGqI\/AAAAAAAADnE\/FNH_XJWzef0JSwcMCq5t2z1xM498-iq6wCLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00006.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"314\" src=\"https:\/\/2.bp.blogspot.com\/-t_mve6zhLT4\/WG-aT1fqGqI\/AAAAAAAADnE\/FNH_XJWzef0JSwcMCq5t2z1xM498-iq6wCLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00006.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003EYes, indeed\nit have learned about Vlan 300 and if we do a\u003Cspan style=\"color: red;\"\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l1 level1 lfo11; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw2#show\nvtp status\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-12TXgOc0hXk\/WG-adB880uI\/AAAAAAAADnM\/iYt8bM8KPbQVTiCTFCTuB1d5si-dtjj2wCLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00007.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"226\" src=\"https:\/\/4.bp.blogspot.com\/-12TXgOc0hXk\/WG-adB880uI\/AAAAAAAADnM\/iYt8bM8KPbQVTiCTFCTuB1d5si-dtjj2wCLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00007.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;We\nshould see a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ematching Configuration Revision\nNumber of 2\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe should see\nsomething very similar on Sw3\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, let’s do a \u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l20 level1 lfo10; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw3#show\nvlan brief\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003EAnd we do see the newly created Vlan of 300 and if we\ndo\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l16 level1 lfo9; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw3#show\nvtp status\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\nWe \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ehave now confirmed that thanks to VTP\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nwe are able to create a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVlan on One Switch and\nhave that Vlan propagated to the other Switches\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E and now let’s\nthink about that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EConfiguration Revision Number\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nlet’s say \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethat i disconnected Switch Sw2 from\nthis topology\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E when Switch Sw2 disconnected, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ei added some Vlans, deleting some Vlans and i modified some\nVlans maybe,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003Ci\u003E\u003Cu\u003Eeach time i made a\nchange the Configuration Revision Number One up\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E it got \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eincremented by One\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Efor every change i made\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, now what would happened\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif i reintroduced that Switch into the topology\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"mso-list: l16 level1 lfo9; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003Eit’s has\nmatching Domain Name\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"mso-list: l16 level1 lfo9; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003Eit’s got\nmatching Password which means that it’s higher Configuration Revision number\nwould make its Vlan Database to most believable Vlan database all of the\nSwitches in the topology\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; And in the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVlan Databases are Switches Sw1 and Sw3 they would be wiped\nout and replaced with this newly learned Vlan information from Switch Sw2\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nwe might do that accidently however, we might have a malicious user who did\nsuch a thing intentionally which is the big reason that we want to have a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EPassword assign to our VTP Domain\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, the moral\nof the story is we need to be an extremely \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Econscious\nwhen we introducing the Switch into our topology\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, the safest\nthing to do is to set the Configuration Revision Number for Switch that you\nabout to add to a topology, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eto set that\nConfiguration Revision number to 0 \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Ehowever, there is a lot of\nconfusion about how that works and i wanted to demonstrated for you.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Now what i am going to do is \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Edisconnecting the Switch Sw2 from Sw1\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ei am gonna disconnect that Trunk connection and i am gonna\nmake some changes on it, so did it has the higher Configuration Revision Number\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nafter i disconnected Switch Sw2, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ei made some\nchanges to its Vlan Database\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E notice that if i do a \u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l11 level1 lfo8; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw2#show\nvtp status\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-FK5g2y_49WI\/WG-aoCS8L-I\/AAAAAAAADnQ\/rmPPbpcVf40i_IMlTDjhhmDBzYsS5FVfwCLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00008.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"314\" src=\"https:\/\/2.bp.blogspot.com\/-FK5g2y_49WI\/WG-aoCS8L-I\/AAAAAAAADnQ\/rmPPbpcVf40i_IMlTDjhhmDBzYsS5FVfwCLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00008.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003EIt’s\nConfiguration Revision Number of 7 and if i take a look my Vlan database, let’s\ndo that a\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l18 level1 lfo7; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw2#show\nvlan brief\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-qBGLCOYsRPs\/WG-a7Eca-rI\/AAAAAAAADnc\/duiSmZblBY8t_WaugaSTQXF_kXDsafkZACLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00009.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"308\" src=\"https:\/\/4.bp.blogspot.com\/-qBGLCOYsRPs\/WG-a7Eca-rI\/AAAAAAAADnc\/duiSmZblBY8t_WaugaSTQXF_kXDsafkZACLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00009.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; You\nwill see that i \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Edidn’t have any longer a Vlan\n100,200,300\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebut \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ei have got couple of new Vlans that i just been adding or been\nplaying with this on my desk\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E let say, that’s what the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVlan Database currently looks like for Switch Sw2 but it’s\ndisconnected\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E so we good if i go back to Switch Sw1 and do a\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l13 level1 lfo6; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1#show\nvtp status\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-fxKngZvPWSs\/WG-bCbiObvI\/AAAAAAAADnk\/s51Th-z_ud8sMqmN1kdY4BmlS6wWLB-bwCLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00010.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"322\" src=\"https:\/\/1.bp.blogspot.com\/-fxKngZvPWSs\/WG-bCbiObvI\/AAAAAAAADnk\/s51Th-z_ud8sMqmN1kdY4BmlS6wWLB-bwCLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00010.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; You can\nsee that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit’s Configuration Revision Number is a 2,\nit’s much lower than the what we have on a Sw2\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand if i take a look at the Vlan Database, we do a\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l8 level1 lfo5; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1#show\nvlan brief\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-tR7ebha42f4\/WG-bJ_kZANI\/AAAAAAAADno\/1USroXzfSnE76r8k_Lm2yLjYEkh8IR4OQCLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00011.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"324\" src=\"https:\/\/4.bp.blogspot.com\/-tR7ebha42f4\/WG-bJ_kZANI\/AAAAAAAADno\/1USroXzfSnE76r8k_Lm2yLjYEkh8IR4OQCLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00011.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp;\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EWe have the Vlans that we had a few\nmovement ago, 100, 200 and 300\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand\nlet’s say that after experimenting with Switch Sw2 and trying a few things\nmaybe upgrading the Cisco iOS on a Switch\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E, i am\nready to reintroduce this Switch Sw2 into my topology\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\nLet’s say that i know about VTP and i know that with this higher\nConfiguration Revision Number of 7, i would blow away the existing Vlan\nDatabases on my Switches, here is common misconception many people think, to\nprevent that happening i just set the Switch to Client mode and please make\nsure that i am saying this is a misconception setting this to Client Mode is\nnot a solution, i am about to prove that to you but some people would\nmistakenly say \u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"margin-left: 45.0pt; mso-add-space: auto; mso-list: l5 level1 lfo24; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw2(config)#vtp\nmode client\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003EWhat harm\ncould client do, well we set the mode to a Client but if we take a look at VTP status\nusing\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l6 level1 lfo4; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw2#show\nvtp status\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-bEg0CpbXn7w\/WG-bSj5EzyI\/AAAAAAAADns\/KRhPq9Ks2dMCFKYT35Gpg3AsyBAs2vuLwCLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00012.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"274\" src=\"https:\/\/4.bp.blogspot.com\/-bEg0CpbXn7w\/WG-bSj5EzyI\/AAAAAAAADns\/KRhPq9Ks2dMCFKYT35Gpg3AsyBAs2vuLwCLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00012.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;That\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Edidn’t reset my configuration Revision Number\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebut i am client what harm could it do, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Elet’s reconnect Switch Sw2 back into the Network\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EI have now reconnected Switch Sw2 to the network,\nlet’s go over to Switch Sw1 and see if anything changed on Switch Sw1\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l0 level1 lfo3; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1#show\nvlan brief\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l0 level1 lfo3; text-indent: -.25in;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-iQQrgANCurA\/WG-bbD5ulfI\/AAAAAAAADn0\/p-mZ6LbqHYghQnxAEHve2KCMPSnbtekYACLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00013.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em; text-align: center; text-indent: 0px;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-iQQrgANCurA\/WG-bbD5ulfI\/AAAAAAAADn0\/p-mZ6LbqHYghQnxAEHve2KCMPSnbtekYACLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00013.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Oh\nno! what \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ehappened Switch Sw1 had its Vlan\nDatabase blown away,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003Ci\u003E\u003Cu\u003Ewe are now\nmissing Vlans 100 and 200 and 300\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E, now we have these \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E200 Odd Vlans that we didn’t want, Vlans 400 and 500\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nwhat happened was \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe introduce Switch Sw2 on the\nnetwork, it had a matching Domain Name, it had a matching Password and it had a\nhigher Configuration Revision number and it wiped out the Vlan Databases on\nSwitch Sw1 and SW3\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, let’s confirm that on Sw3\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l9 level1 lfo2; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003ESw3#show\nvlan brief\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-q2ORFnhroJI\/WG-bth_Or_I\/AAAAAAAADn8\/c2H3pbpXiI0JLxFJHz0vbMkBppROGAkHgCLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00014.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/1.bp.blogspot.com\/-q2ORFnhroJI\/WG-bth_Or_I\/AAAAAAAADn8\/c2H3pbpXiI0JLxFJHz0vbMkBppROGAkHgCLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00014.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: left;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u003Cu\u003ESame problem here,\nwe have done some serious damage\u003C\/u\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003E \u003C\/span\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003Eand \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ei don’t want you to do that accidently in a production\nnetwork, so the question is how do we fix this\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E?\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003EHow do we safely add a Switch into the topology, well we\nwould like to have the Configuration Revision Number set to a 0, i am gonna go\nover and disconnect Switch Sw2 again, and with it disconnected, i am going to\nrepair our Vlan Databases on Switch Sw1 and Sw3, let’s go to Switch Sw1 and let’s\ndelete Vlan 400 and 500\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"mso-list: l9 level1 lfo2; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config)#no\nvlan 400\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"mso-list: l9 level1 lfo2; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config)#no\nvlan 500\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003ELet’s put\nback the Vlan we originally had, we had\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"mso-list: l17 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config)#vlan\n100\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"mso-list: l17 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-vlan)#name\nACCT\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"mso-list: l17 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-vlan)#exit\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"mso-list: l17 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config)#vlan\n200\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"mso-list: l17 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-vlan)#name\nSALES\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"mso-list: l17 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-vlan)#exit\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"mso-list: l17 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config)#vlan\n300\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"mso-list: l17 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-vlan)#name\nVTP_TEST\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"mso-list: l17 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-vlan)#exit\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"mso-list: l17 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1#show\nvlan brief\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-oK-gj8sT5qU\/WG-b6cZvrcI\/AAAAAAAADoI\/sK8aBbenpz067KrFZVShTB7FbpWNLbvfwCEw\/s1600\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00015.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-oK-gj8sT5qU\/WG-b6cZvrcI\/AAAAAAAADoI\/sK8aBbenpz067KrFZVShTB7FbpWNLbvfwCEw\/s640\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00015.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; That\nlooks better, has this been advertised over to Switch Sw3, it should have been let\njust confirm that, let do a\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw3#show vlan brief\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp;\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-mP0RyKXm3hU\/WG-cSZY7sQI\/AAAAAAAADoU\/NGhf0Idj_jg3h6y46dvf4T0s5FTPWdU5gCEw\/s1600\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00016.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em; text-align: center;\"\u003E\u003Cimg border=\"0\" height=\"186\" src=\"https:\/\/4.bp.blogspot.com\/-mP0RyKXm3hU\/WG-cSZY7sQI\/AAAAAAAADoU\/NGhf0Idj_jg3h6y46dvf4T0s5FTPWdU5gCEw\/s640\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00016.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Things\nare looking happy here as well, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Enow back to\nSwitch Sw2, Switch Sw2 is now been disconnected from Sw1\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, before\nintroducing the Switch into the network, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Elet’s\nmake Configuration Revision Number 0.\u003C\/span\u003E\u003C\/u\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003E\u003C\/i\u003EHow\ndo we do that, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Esetting it to Client mode didn’t\nhelp because a Client Mode Switch can originate and did originate VTP advertisements\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nhow do we set this to 0?\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003EWe \u003Cspan style=\"color: red;\"\u003Etoggle on and off Transparent Mode \u003C\/span\u003Ehere what I mean\u003Cspan style=\"color: red;\"\u003E, let’s go to Global Configuration Mode in Sw2\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l22 level1 lfo25; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw2#vtp\nmode transparent\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003EAnd in\ntransparent mode, let’s take a look at our VTP status.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l22 level1 lfo25; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw2#show\nvtp status\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-0C9aNAH7NvY\/WG-cthsw8_I\/AAAAAAAADoc\/ZqnThc8ejMAKVVTneNi4Dq-wNWXc4EjhACLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00018.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"354\" src=\"https:\/\/2.bp.blogspot.com\/-0C9aNAH7NvY\/WG-cthsw8_I\/AAAAAAAADoc\/ZqnThc8ejMAKVVTneNi4Dq-wNWXc4EjhACLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00018.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;Our \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EConfiguration Revision Number is 0\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, interestingly\nis, and now i can put it back to something else, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ei\ncould set it back to Server\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eif i\nwanted to\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l22 level1 lfo25; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw2#vtp\nmode server\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;If we \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Elook at\nour VTP status the Configuration Revision Number remains at 0\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nuntil we \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Estart making changes to Vlan Database then\nit would go up by 1\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebut \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Enow a Server Mode Switch and my Configuration Revision Number\nis 0\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit’s now safe to add this\nback into the network\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u0026nbsp;\u0026nbsp;\u0026nbsp;Some people \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Elike\nto take this step beyond this\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ebeyond\njust setting the Configuration Revision Number to a 0 some people like to also\nwipe out the Vlan Database on a Switch \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Ebefore they added to the\nnetwork, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif you did wanna do that remember that\nVlan Database is stored in a separate file in our Flash it’s called vlan.dat\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003EWe can just\ndelete that, if we want, we could say\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l22 level1 lfo25; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw2#delete\nflash:vlan.dat\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; After\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Epressing the Enter it’s gonna be safe to\nreconnect Switch Sw2 to the network\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand\nit’s safe not because we \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Edelete the vlan.dat file\nit’s safe because my Configuration Revision number is 0 let’s reconnect it \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Switch\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESw2 is now been reconnected to the network and we\nintroduced it to safely\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebecause \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe had Configuration Revision number of 0 on that Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Elet’s see what its \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ecurrent\nVTP status is\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l22 level1 lfo25; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw2#show\nvtp status\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-Ow4mfLggVFo\/WG-c-FNv9mI\/AAAAAAAADok\/lswu-GqbuEkOMFLXfA56MDCwXJaj-OpZQCLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00019.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"354\" src=\"https:\/\/2.bp.blogspot.com\/-Ow4mfLggVFo\/WG-c-FNv9mI\/AAAAAAAADok\/lswu-GqbuEkOMFLXfA56MDCwXJaj-OpZQCLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00019.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;Look at this its \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EConfiguration Revision Number went from a 0 up to 12\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nit now knows about the Vlans in our topology we can prove that with a\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l22 level1 lfo25; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw2#show\nvlan brief\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-BPOg4R0PPYo\/WG-dG_YEz3I\/AAAAAAAADoo\/KXrmRrFQXIwapTtlK6iJciB3NAm5AAqoACLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00020.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"356\" src=\"https:\/\/2.bp.blogspot.com\/-BPOg4R0PPYo\/WG-dG_YEz3I\/AAAAAAAADoo\/KXrmRrFQXIwapTtlK6iJciB3NAm5AAqoACLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00020.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; It\nknows about \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVlan 100,200 and 300\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit no longer knows about 400 and 500\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E we\nintroduced the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESwitch with the Configuration\nRevision Number of 0\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand as \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ea result we learned from a Switch Sw1 what the Vlan Database\nshould look like for this topology\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EThat’s\nthe look at how to Configure VTP and how we could safely add a Switch into an\u003Cu\u003E\n\u003C\/u\u003Eexisting Switch topology\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EJoin\nme on next session about Voice Vlan Theory\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%; mso-bidi-font-size: 11.0pt;\"\u003E\u0026nbsp;\u003C\/span\u003E\u003C\/b\u003E\u0026nbsp;\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cspan style=\"color: blue; font-family: \u0026quot;trebuchet ms\u0026quot; , sans-serif; font-size: x-large;\"\u003E\u003Ci\u003E\u003Cb\u003E\u003Cu\u003E\u003Ca href=\"https:\/\/drive.google.com\/open?id=0Bxhcn6La3ysgN0xyV2sydV8xWDg\" target=\"_blank\"\u003EClick Here To Download The PDF File\u003C\/a\u003E\u003C\/u\u003E\u003C\/b\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"background-color: #faf7f7; color: #444444; font-family: \u0026quot;trebuchet ms\u0026quot;, sans-serif; font-size: 16px; margin: 0px; padding: 0px;\"\u003E\n\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;If You Like the Post. Don’t forget\u0026nbsp;\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"background-color: #faf7f7; color: #444444; font-family: \u0026quot;trebuchet ms\u0026quot;, sans-serif; font-size: 16px; margin: 0px; padding: 0px;\"\u003E\n\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"background-color: #faf7f7; color: #444444; font-family: \u0026quot;trebuchet ms\u0026quot;, sans-serif; font-size: 16px; margin: 0px; padding: 0px;\"\u003E\n\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp;\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003Eto\u0026nbsp;“\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: #0070c0; font-size: 18pt; margin: 0px; padding: 0px;\"\u003ESubscribe\/Share\/Comment\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003E”. Thank You.\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003C\/div\u003E\n"},"link":[{"rel":"replies","type":"application/atom+xml","href":"http:\/\/www.ccnaccnplinux.com\/feeds\/4964668336152575948\/comments\/default","title":"Post Comments"},{"rel":"replies","type":"text/html","href":"http:\/\/www.ccnaccnplinux.com\/2017\/01\/vtp-configuration.html#comment-form","title":"1 Comments"},{"rel":"edit","type":"application/atom+xml","href":"http:\/\/www.blogger.com\/feeds\/4366728018987920734\/posts\/default\/4964668336152575948"},{"rel":"self","type":"application/atom+xml","href":"http:\/\/www.blogger.com\/feeds\/4366728018987920734\/posts\/default\/4964668336152575948"},{"rel":"alternate","type":"text/html","href":"http:\/\/www.ccnaccnplinux.com\/2017\/01\/vtp-configuration.html","title":"VTP Configuration"}],"author":[{"name":{"$t":"Unknown"},"email":{"$t":"noreply@blogger.com"},"gd$image":{"rel":"http://schemas.google.com/g/2005#thumbnail","width":"16","height":"16","src":"https:\/\/img1.blogblog.com\/img\/b16-rounded.gif"}}],"media$thumbnail":{"xmlns$media":"http://search.yahoo.com/mrss/","url":"https:\/\/1.bp.blogspot.com\/-bWFaKVh9LJY\/WG-ZiibPA-I\/AAAAAAAADms\/4IRkOIGo2OA-F-VLLLMooQgAVOp8xi3sgCLcB\/s72-c\/www.ccnaccnplinux.com%2BVTP%2BConfiguration00003.jpg","height":"72","width":"72"},"thr$total":{"$t":"1"}},{"id":{"$t":"tag:blogger.com,1999:blog-4366728018987920734.post-1092871471144386580"},"published":{"$t":"2016-12-28T22:05:00.000+05:30"},"updated":{"$t":"2016-12-28T22:05:54.628+05:30"},"category":[{"scheme":"http://www.blogger.com/atom/ns#","term":"CCNP Switch(300-115 and 642-813)"}],"title":{"type":"text","$t":"VTP Theory"},"content":{"type":"html","$t":"\u003Cdiv dir=\"ltr\" style=\"text-align: left;\" trbidi=\"on\"\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cimg src=\"https:\/\/1.bp.blogspot.com\/-m4SaYPshRh8\/WGPlS2TZIBI\/AAAAAAAADi0\/faOoWqpcYOIcDTjPRRa_sz9u9V_Axye-QCLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BTheory00016.jpg\" \/\u003E\u003Cbr \/\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;Now we \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Etalked bit about Vlans and Trunks\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, let’s\nimagine \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethat we have a topology that looks like\nwhen we see on picture\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-MtuJhj__g48\/WGPbsUjA8MI\/AAAAAAAADhA\/PBFdiaXpul8vLypeSF28IE39K4QaXf9ewCLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BTheory00001.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/1.bp.blogspot.com\/-MtuJhj__g48\/WGPbsUjA8MI\/AAAAAAAADhA\/PBFdiaXpul8vLypeSF28IE39K4QaXf9ewCLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BTheory00001.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;We have got \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E5 Switches that are interconnected like you see here with\nTrunks\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E and let’s \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eimagine that we\nusing Dot1Q Trunks\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand what \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe want to do is add a New Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, let’s imagine\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethat there is a new Department and we need to add\na Vlan for that new Department\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E and \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Elet’s imagine all these Switches are in the same building\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nwhat we could do is, we can go to each Switch, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe\ncan go to Switch1\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand say “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eyou have a new Vlan and that new Vlan is 300\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Then \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe could go to the next Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand say “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eyou have new\nVlan of 300\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”,then we could go to next, next and next, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe could go to each Switch individually\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E and\nsay “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eyou got a new Vlan”\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E that’s \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Esolution of we think about it doesn’t scale very well,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eif we have to \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Evisit\nevery Single Switch that could be a lot of administrative overhead\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\nif we \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewanted to add or delete or change Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; But the good news is if we\ndo have a topology like this, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe can take\nadvantage of something called VTP, “The Vlan Trunking Protocol”\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nbe \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ecareful don’t be thrown off by name\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nthe name of \u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVlan Trunking Protocol makes it sound\nlike here is the protocol that does Trunking\u003C\/span\u003E\u003C\/u\u003E you really doesn’t, if\ni could name this Protocol, i would called it \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E“The\nVlan Advertisement Protocol”\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E because that what it does, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit advertises Vlan information.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u003C\/span\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003ELet’s go back to scenario \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewhere we want to create Vlan 300 on all of the Switches\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\nwhat \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe can do with VTP is create Vlan 300 on Switch1\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\nand then we could send VTP advertisements down to our neighboring Switches.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-Uv5H_MNvNRU\/WGPcVBEXT-I\/AAAAAAAADhE\/C8uWbLEcv00qBd0So4Rbl7D1h-CE4eVdACLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BTheory00002.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/2.bp.blogspot.com\/-Uv5H_MNvNRU\/WGPcVBEXT-I\/AAAAAAAADhE\/C8uWbLEcv00qBd0So4Rbl7D1h-CE4eVdACLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BTheory00002.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; But, please keep in mind\nthat \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethis Advertisements has to be over Trunks\nlinks maybe that’s why it’s called Vlan Trunking Protocol\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebecause \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit flows over\nTrunks links\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand when the\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E Switches in the middle get these Advertisements\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nthey could now say “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ehey! we have got a new Vlan”\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESwitch2 now has a Vlan of 300\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESwitch3 it also has\na newly created Vlan in its local Vlan database on of 300.\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-ky6Bn0kIrMw\/WGPeU9uU8BI\/AAAAAAAADhU\/0KEXCtd8PFgj0MbgSwQ-Fc6rhdUga_FrQCLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BTheory00003.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/1.bp.blogspot.com\/-ky6Bn0kIrMw\/WGPeU9uU8BI\/AAAAAAAADhU\/0KEXCtd8PFgj0MbgSwQ-Fc6rhdUga_FrQCLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BTheory00003.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cspan style=\"font-size: 12pt;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp;\u003C\/span\u003E\u003Cb style=\"font-size: 12pt;\"\u003EAnd \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethese Switches on the middle that received the VTP\nAdvertisements\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ethey could send \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVTP Advertisements out of their other Trunks Port,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003Ci\u003E\u003Cu\u003Eletting the Switches on the bottom know that they now\nhave a new Vlan\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESwitch4 has a\nVlan of 300\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESwitch5 it also has a newly created Vlan of 300\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/b\u003E\u003Cbr \/\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-nLAH0HEqKEw\/WGPg_SFontI\/AAAAAAAADhk\/Yx2qwaVSgJkjb-bVUfVj5lSD6l3y9paOwCLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BTheory00004.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/4.bp.blogspot.com\/-nLAH0HEqKEw\/WGPg_SFontI\/AAAAAAAADhk\/Yx2qwaVSgJkjb-bVUfVj5lSD6l3y9paOwCLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BTheory00004.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; Now \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eevery Switch in this topology knows about Vlan 300\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\ni\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Et’s added to the Vlan Database of each of these\nSwitches and we only had to edit to one Switch which dramatically cuts down on\nthe Administrative overhead of going to each Switch individually\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nthat’s the broad overview of what VTP can do for us, \u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ebut obesely there are many options we can configure for example\u003C\/span\u003E\u003C\/u\u003E,\nwe might want to ask the design question, if we want to use VTP amongst these\nSwitches, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Edo i want to able to go to any of these\nSwitches and add or delete or rename of Vlan or should it be just one or more\nselect Switches\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; If \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe do not want a particular Switch to be able to create and\nmodify or delete Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, let’s say Switch4, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe can go it and say “you are operating a Client mode\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003Cbr \/\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-aCrCPo0Xfc8\/WGPhSPwTBJI\/AAAAAAAADho\/2PpqeDCY91ctmojDQM6_fLn5w_fg4ofSACLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BTheory00005.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/4.bp.blogspot.com\/-aCrCPo0Xfc8\/WGPhSPwTBJI\/AAAAAAAADho\/2PpqeDCY91ctmojDQM6_fLn5w_fg4ofSACLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BTheory00005.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp;\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EA Client Mode Switch can update its database and response to\nVTP Advertisement that it receives\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand\nif it does \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ereceive VTP Advertisement it will\nstill have forwarded on out of its other Trunk Ports\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, but we\ncannot administratively connect to that Switch and say “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe want to create a Vlan, we want to delete a Vlan and we want\nto rename the Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ENo, Client mode Switch it’s Vlan database only gets updated\nbased on Advertisements that it received and again it can forward those\nAdvertisement on, they don’t terminate on the Client Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand in addition to having Client mode, we also have a\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EServer mode.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-GcJAtwtRz8c\/WGPhe4Qd9tI\/AAAAAAAADhs\/FdkxmsegUd84ZKAUDFxTNEJh7ULoaH4LACLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BTheory00006.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/4.bp.blogspot.com\/-GcJAtwtRz8c\/WGPhe4Qd9tI\/AAAAAAAADhs\/FdkxmsegUd84ZKAUDFxTNEJh7ULoaH4LACLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BTheory00006.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cb\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u003C\/span\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp;\u003C\/span\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003ELet’s \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eimagine\nthat this Switch1 is running in a Server mode\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand the Switch that operating in \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVTP Server mode can create modify and delete a Vlan locally\nand that change will be propagated over Trunk links to neighboring Switches\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand if it receives a VTP advertisements maybe from\nanother Server, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EYes we can have multiple Servers\non our topology that perfectly fine\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, if it \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ereceives a VTP advertisements it’s gonna forwarded on out of\nits other Trunks Ports and like we said\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we can have \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Emultiple Server in a topology, we can have multiple Client as\nwell\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u0026nbsp;Let’s imagine that this \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESwitch2 is another Server mode Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, this \u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESwitch5 is a Client Mode Switch\u003C\/span\u003E\u003C\/u\u003E but there is one\nother option we not yet mentioned and it’s a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETransparent\nMode Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003Cbr \/\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-tjnNtewKSH4\/WGPhqEdvanI\/AAAAAAAADhw\/K-V7SpFL3mUz3r3mZdrOEJr_4A2ibq9RwCLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BTheory00007.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-tjnNtewKSH4\/WGPhqEdvanI\/AAAAAAAADhw\/K-V7SpFL3mUz3r3mZdrOEJr_4A2ibq9RwCLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BTheory00007.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E\u0026nbsp;A Transparent Mode\nSwitch can create modify or delete Vlans in its local database\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nwhen we make a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Echange to a Transparent Mode\nSwitch that change is not advertised to other Switches.\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E What\nhappened when \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ea Transparent Mode Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ereceives a VTP Advertisement?\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; As you might guess that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETransparent Mode Switch does not update its database based on\nthat advertisement, \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Echanges to a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETransparent\nMode Switches Vlan databases\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ecan\nallow, we \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Emade locally on that Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebut just because the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETransparent\nMode doesn’t make an update based on received VTP advertisement, that doesn’t\nprevented from sending the Advertisement out of its other Trunk Port,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\nso that other Switches in the topology like the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EClient\nSwitch5 can get that advertisement and make update to its database based on\nthat Advertisement\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; So, sum up \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETransparent Mode operation we not trying to block VTP Advertisements\nif we received one we can forward it on\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, what \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe trying to do is make sure that this Switch3 doesn’t get its\nVlan database updated based on those VTP advertisements\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Well \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eallowing an administrator to connect to that Switch and make\nupdates, make changes to that Vlan database locally on that Switch,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Enow our next session we gonna be taking a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Elook at the Configuration of VTP\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebut before we get into that, couple of other thing we\nwant to do on this session, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ei want to show you a\nside by side comparison of these 3 different VTP modes\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E and also\nwanna you to \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewalk through a sample VTP scenario\non whiteboard to see how things should work\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, then in our next\nsession we go out and see how to actually configure VTP \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ebut for now let’s do\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003Cbr \/\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-IrsTKOaz3vE\/WGPh3a7_2ZI\/AAAAAAAADh0\/OFtRNg70VGYHTUXN-ALYRF91RouFlwqDgCLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BTheory00008.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/1.bp.blogspot.com\/-IrsTKOaz3vE\/WGPh3a7_2ZI\/AAAAAAAADh0\/OFtRNg70VGYHTUXN-ALYRF91RouFlwqDgCLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BTheory00008.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; Here on Picture, we can\nsee those 3 different Modes of VTP operation that we talked about, let’s begin\nby \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Etalking bit about the Server mode \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Eif\nwe have a Switch that is, in a Server mode then we can connect to that\nSwitch(maybe we do a SSH Telnet connection or maybe we connect to the console)\nbut once we administratively connected to that Switch, we can then \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ecreate a Vlan on that Switch have added to that Switches Vlan\ndatabase\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, delete a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVlan from that\nSwitches Vlan database\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eor \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Emodify the existing Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand we already mentioned that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe can have more than 1 Server\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand if \u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EOne Server receives\na VTP advertisement from a another Server it can make an update based on that\nVTP advertisements \u003C\/span\u003E\u003C\/u\u003Eand if it does receive \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVTP advertisement from another Server in the network it can\nforward that VTP advertisement out to other Switches\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Remembering that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethese VTP advertisement only flow over Trunk links and in addition\nto forwarding VTP messages that Server receives, it can also originate VTP advertisements\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nlet’s say that we make a change on a Switch that’s configured in a Server Mode\nand \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit sends that Advertisement out to a neighboring\nSwitch,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eneighboring Switch is\ngonna take a look that Advertisement\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E and say “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eok!\u0026nbsp; let me compare\nthis Advertisement with the context of my Vlan Database\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E” let see\n\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"margin-left: 45.0pt; mso-add-space: auto; mso-list: l1 level1 lfo1; tab-stops: 9.0pt; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EWhich version of Vlan\ninformation seems to be most up to date\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E? \u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"margin-left: 45.0pt; mso-add-space: auto; mso-list: l1 level1 lfo1; tab-stops: 9.0pt; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003Eis it the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVTP Advertisement or it’s my Local Database? \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"margin-left: 45.0pt; mso-add-space: auto; mso-list: l1 level1 lfo1; tab-stops: 9.0pt; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EHow does a Switch determinate \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif one Vlan databases is more up to date then another Vlan Database\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E?\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Well every time we\nmake a change to our \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVlan database on a Server\nMode Switch it’s going to increment a number\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, it’s called the “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EConfiguration Revision Number\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003Cbr \/\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-J9PN5I9NOFQ\/WGPiK6P3hkI\/AAAAAAAADh8\/OnOf8_k6wR0uYb9Q7gLqzvqpxFzL637mgCLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BTheory00009.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/2.bp.blogspot.com\/-J9PN5I9NOFQ\/WGPiK6P3hkI\/AAAAAAAADh8\/OnOf8_k6wR0uYb9Q7gLqzvqpxFzL637mgCLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BTheory00009.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cspan style=\"color: red; font-family: wingdings; font-size: 16px; text-indent: -24px;\"\u003EØ\u003C\/span\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal; text-indent: -24px;\"\u003E\u0026nbsp;\u003C\/span\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EAnd\nif we add a Vlan, that’s adds 1 to whatever the Current Configuration Revision\nNumber is\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003Cbr \/\u003E\n\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12pt; line-height: 107%; text-indent: -0.25in;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003Cb style=\"text-indent: -0.25in;\"\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EIf we change the\nname of Vlan, it’s gonna increment that by another 1\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003Cbr \/\u003E\n\u003Cspan style=\"font-family: \u0026quot;wingdings\u0026quot;; font-size: 12pt; line-height: 107%; text-indent: -0.25in;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003Cb style=\"text-indent: -0.25in;\"\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EIf we delete the\nVlan, it gets increment again by 1\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;And when \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESwitch receives a VTP advertisement\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eit’s \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Egoing to compare\nthe “Configuration Revision number of that Advertisements” with the “Configuration\nRevision Number of its local Vlan database”\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, whichever \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Enumber is higher that’s the one, it’s gonna be believed\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nthat’s considered to be a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Emost Authoritative and\nthat’s the version of the Vlan Database we go with\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; If we \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ehave a Switch that’s running in a Client mode\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe cannot connect to that Switch and make any\nchanges to our Vlan database locally\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe cannot create, modify and delete a Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E but\nthat Switch does have a Vlan database and \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit can\nupdate its database based on received Advertisements and if it receives a VTP Advertisement\nit can forward that out its other Trunk Ports to neighboring Switches\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand here something that not as obvious.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EThe\nClient Mode Switch can originate a VTP advertisement\u003C\/span\u003E\u003C\/u\u003E, it’s gonna be\ntelling its neighboring Switches “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ehey guys! This\nis what my Vlan database look like\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”, even though we \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Edon’t make modification locally to that Client Mode Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit can still send out its version of the Vlan database\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nlet me give you example, let say that.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; I purchase a new Switch\nand i had that Switch sitting on my desk, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ei am\ndoing some experiments maybe i updated the Cisco iOS version on it, i have been\nadding some Vlans and deleting some of\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E and \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit’s been Server mode that time,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand every time i made a change it \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eincremented the Configuration Revision Number\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Well now \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Elet say it’s time to added it to a Network\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand i say, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe gonna set\nthis to Client Mode and i set it to Client Mode\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebut that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Edoesn’t reset\nthe Configuration Revision Number\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, i added to the network that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EClient Mode Switch is gonna advertise its version of the Vlan\ndatabase to the other Switches \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Eand if based on the changes i have\nbeen making locally, the Switch sitting up my desk, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif those changes caused the Configuration Revision number to\nbe higher than the Configuration Revision number that all the Switches\ncurrently have\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, guess they \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Egonna\nbelieve, they gonna believe my newly added Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand we could \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eaccidently\nblow away the correct Vlan Database for all of the other Switches.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u003C\/span\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EBut coming up \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ei am gonna give you some recommendations about how to safely\nadd a Switch to your Network \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Eand our \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Efinal mode of VTP Operation is Transparent Mode\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003Cbr \/\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-Bs7i3bo4fQM\/WGPjGpnCBjI\/AAAAAAAADiM\/FLTuiGowbPkdtj2vtxBkF7O9ANsI2AKjgCLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BTheory00010.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/2.bp.blogspot.com\/-Bs7i3bo4fQM\/WGPjGpnCBjI\/AAAAAAAADiM\/FLTuiGowbPkdtj2vtxBkF7O9ANsI2AKjgCLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BTheory00010.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; On a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETransparent mode Switch we can create, modify and delete\nVlans but those changes only going to apply to that Switches Vlan database\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethose changes do not get advertised to anyone\nelse\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, and if this \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETransparent mode\nSwitch receives a VTP advertisements it can forwarded on to other Switches,\nit’s not trying to block VTP advertisement \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Ewith a\u0026nbsp; \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETransparent Mode\nSwitch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebut the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETransparent Mode Switch is going to ignore that Advertisements\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nanother words, “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit’s not going to update its\nlocal database based on the context of that advertisement”\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, in\neven though \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit can forward VTP messages it’s not\ngoing to originate any of those Advertisements \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Eand now we go\nthis \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eclear understanding of these different VTP Modes\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nlet’s go back to that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Etopology that we were\nlooking at few movement ago\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand\nwalk through an example of \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewhat’s happening in\nbackground with VTP when we go to a Switch and add a Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E?\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Going back to our\ntopology from earlier \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Elet’s assigned some\ndifferent Modes of these Switches\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, let’s say that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethe Switch1 is in Server Mode\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand we say \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethis Switch2\nis Server Mode Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we make the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESwitch3 is Transparent Mode\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand\nlets also make \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethe Switch4 in a Transparent Mode\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\nand we will through on Client as well, let say the \u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESwitch5\nin a Client Mode\u003C\/span\u003E\u003C\/u\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003Cbr \/\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-0lKiL-Cqq-Q\/WGPjm3KDWPI\/AAAAAAAADiQ\/s9dHPt23cJAHuRlJuNwk9rxgsbwacQjxACLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BTheory000011.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-0lKiL-Cqq-Q\/WGPjm3KDWPI\/AAAAAAAADiQ\/s9dHPt23cJAHuRlJuNwk9rxgsbwacQjxACLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BTheory000011.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; To begin with the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EConfiguration Revision Number of this topology is 10\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nand we make a change, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe go to one of the Servers\nnot the Client\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we go to one of the Servers and we just use the\nSwitch1 Server and we say “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EWe going to add vlan 300\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”,\nwhen we do that on the Server Mode Switch, it’s \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Egoing\nto go head and update its Local Vlan Database to add that Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand its \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EConfiguration\nRevision Number,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003Ci\u003E\u003Cu\u003Eabbreviated that\nCRN\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit’s Configuration Revision\nNumber now goes from a 10 to an 11\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003Cbr \/\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-YeU2rNBI9q4\/WGPjxBGM8zI\/AAAAAAAADiY\/XI7SZIjTqdsWiDmCob7CKM3RHCYFLZZgQCLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BTheory000012.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/1.bp.blogspot.com\/-YeU2rNBI9q4\/WGPjxBGM8zI\/AAAAAAAADiY\/XI7SZIjTqdsWiDmCob7CKM3RHCYFLZZgQCLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BTheory000012.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;And \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit’s gonna send VTP advertisements out\nits Trunk Ports to its neighboring Switches\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, what \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ehappened when this Switch2\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, this \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EServer mode Switch2 gets that VTP Advertisement\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nlet’s gonna look advertisement and say\u003C\/span\u003E\u003C\/b\u003E\u003Cbr \/\u003E\n\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12pt; line-height: 107%; text-indent: -0.25in;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003Cb style=\"text-indent: -0.25in;\"\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EHow does the\u003Cspan style=\"color: red;\"\u003E Configuration\nRevision Number of that Advertisement \u003C\/span\u003Ecompare to the \u003Cspan style=\"color: red;\"\u003EConfiguration Revision Number of my Vlan Database?\u003C\/span\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; And its gonna say “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EOh! the Advertisement is an 11, my Local Database is 10\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”,\ni am \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Egoing to believe the Advertisement and i am\ngoing to create Vlan 300 and my local Vlan Database\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, it’s also\ngoing to \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eforward that Vlan Advertisement out all\nof its other Trunk Ports\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003Cbr \/\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-zAQtPFx3jko\/WGPkBG4X-mI\/AAAAAAAADig\/erEaWz-M0k4nUab6sUMM3uKJJSEOTuTRgCLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BTheory000013.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/4.bp.blogspot.com\/-zAQtPFx3jko\/WGPkBG4X-mI\/AAAAAAAADig\/erEaWz-M0k4nUab6sUMM3uKJJSEOTuTRgCLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BTheory000013.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"margin-left: 43.0pt; mso-add-space: auto; mso-list: l0 level1 lfo3; tab-stops: 137.9pt; text-indent: -.25in;\"\u003E\n\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EWhich is gonna takes it down to this \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESwitch4 Transparent Mode Switch \u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"margin-left: 43.0pt; mso-add-space: auto; mso-list: l0 level1 lfo3; tab-stops: 137.9pt; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EWhat happens when this Advertisement\nreaches to Switch3 Transparent Mode Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E?\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; Well in its \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETransparent Mode meaning that it’s not going to update its\nLocal Database based on that Advertisement\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, however \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit will forwarded it out it’s gonna send it down to Switch5\nClient Mode Switch.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003Cbr \/\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-LCcTqc-cGHk\/WGPk7F7wN7I\/AAAAAAAADis\/2YXinNIVr0ItGuTYOdKyU-Cy1taGoYhFwCLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BTheory000014.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/2.bp.blogspot.com\/-LCcTqc-cGHk\/WGPk7F7wN7I\/AAAAAAAADis\/2YXinNIVr0ItGuTYOdKyU-Cy1taGoYhFwCLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BTheory000014.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; Now what happens with \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESwitch4 Transparent Mode Switch, same thing is the other\nTransparent Mode Switch, the advertisement is going to be ignored\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebut the Client Mode Switch gonna say “\u003Cspan style=\"color: red;\"\u003Ewho has the highest Configuration Revision Number\u003C\/span\u003E”, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethe VTP Advertisements or my Local Vlan Database, \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Eit\nconcludes \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethat the Advertisements is higher\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nit’s \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Egot an 11, Switch5 Client Mode Switch it\nwill also install a Vlan of 300 in its Local Vlan Database\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-MY6EJGU5G60\/WGPkx5Ui7OI\/AAAAAAAADio\/--smNs5CY5IT820te88LdxU2MukYEqy6wCEw\/s1600\/www.ccnaccnplinux.com%2BVTP%2BTheory000015.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/4.bp.blogspot.com\/-MY6EJGU5G60\/WGPkx5Ui7OI\/AAAAAAAADio\/--smNs5CY5IT820te88LdxU2MukYEqy6wCEw\/s640\/www.ccnaccnplinux.com%2BVTP%2BTheory000015.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; Now the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eentire Switches in topology has gone from Configuration\nRevision Number of 10 to an 11, \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Ewe say that synchronization is\nnow complete and this is gonna be our study state \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Euntil another change is made in the topology.\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u003C\/span\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EAnd by the way, when we made this\nchange on \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethat Switch1 that change, that update sends\nout immediately\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Edidn’t wait\nfor some timers where we say we gonna send VTP Advertisement in some seconds\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nnow when the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Echange is made that change gets\nadvertised immediately\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; However, be \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eaware that VTP is going to send out a VTP message every five\nminutes\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebut this \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eperiodic VTP message doesn’t contain the flow of Vlan\ndatabase information\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, it shot \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eof\nlight weight version\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eof that it’s\ngonna contain things like\u003C\/span\u003E\u003C\/b\u003E\u003Cbr \/\u003E\n\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12pt; line-height: 107%; text-indent: -0.25in;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003Cb style=\"text-indent: -0.25in;\"\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EThe VTP domain name\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cbr \/\u003E\n\u003Cspan style=\"font-family: \u0026quot;wingdings\u0026quot;; font-size: 12pt; line-height: 107%; text-indent: -0.25in;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003Cb style=\"text-indent: -0.25in;\"\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EIt \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewill\ncontain the Configuration Revision Number and some information\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Elike that but\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; it’s not\ngonna contain everything, it’s not gonna put big bandwidth impact on the\nnetwork and \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe gonna take a look at Configuration\nof VTP in our next session\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E but here something that we \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ehave to be place in order for VTP to work\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, in\norder for \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESwitches to exchange information via\nVTP\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003Cbr \/\u003E\n\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12pt; line-height: 107%; text-indent: -0.25in;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003Cb style=\"text-indent: -0.25in;\"\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EThey need to be in the same\nVTP Domain\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"margin-left: 4.5pt;\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;The \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EDomain need to be match and\nplease be aware that this domain is Case-Sensitive name\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit’s gonna match on\nour neighboring Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ein order\nfor updates to be made\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand we\nalready mentioned, we have to have Trunk links in a place,\u003C\/span\u003E\u003C\/b\u003E\u003Cbr \/\u003E\n\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12pt; line-height: 107%; text-indent: -0.25in;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003Cb style=\"text-indent: -0.25in;\"\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EVTP advertisements only\nflow over Trunk links, \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-indent: -0.25in;\"\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003Ethey not \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Egonna be send out be\nAccess Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E and optionally,\u003C\/span\u003E\u003C\/b\u003E\u003Cbr \/\u003E\n\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12pt; line-height: 107%; text-indent: -0.25in;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003Cb style=\"text-indent: -0.25in;\"\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EWe can add Passwords\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; We can\nhave the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Esame password on neighboring Switches to\nallow them to exchange VTP information \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Eand prevent somebody from\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eintentionally or accidentally introducing a\nSwitch on the Network that might blow away to existing Vlan database on all our\nSwitches\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E and also want you to know about \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethe different VTP Versions.\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; They are \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ecurrently 3 different Versions of VTP as Version1, Version2\nand Version3,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Elet’s talk about \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Efew of the differences between these different versions of\nVTP,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Efirst of all \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ebetween Version 1 and Version 2\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, here is the\ndifference \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ein Version 1 if we had a Switch set to\nTransparent mode,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E it would \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eactually\ntake a look at the VTP message that it received before it would forwarded out\nother Trunk ports on that Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003Cbr \/\u003E\n\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12pt; line-height: 107%; text-indent: -0.25in;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003Cb style=\"text-indent: -0.25in;\"\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EIt would check to make sure\nthat the domain name matched\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cbr \/\u003E\n\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12pt; line-height: 107%; text-indent: -0.25in;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003Cb style=\"text-indent: -0.25in;\"\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EIt would make sure that the\nVTP version matched and\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cspan style=\"color: red; font-size: 12pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u003Cu style=\"font-style: italic; font-weight: bold;\"\u003Eit would only forward that VTP advertisement if those things matched\u003C\/u\u003E\u003C\/span\u003E\u003Cb\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003E \u003C\/span\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003Eand many people would \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Esay, that is not what would we want a Transparent Mode Switch\nto do,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ewe would want a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETransparent Mode Switch to truly be Transparent and not do\nthose checks\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Well \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVTP version 2 does Transparently forward on VTP\nAdvertisements without checking the Domain Name in the Version\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nwhich is what VTP Version 1 did, and one other \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Edifference\nBetween Versions 1 and 2 is that\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVersion2\nadded a support for Token ring Lan Switching\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EToken ring Vlan’s\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nwe don’t see that much anymore but back in the\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E\ndays Cisco did have a Catalyst Switches that supported Token ring\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebut \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Edifferences did\nVersion 3 bring\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Well \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eversion 3 allowed an additional Vlan numbers to be Advertised\nto be a VTP, this specifically number in a range of 1017 through 4094\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nand something interested that Version 2 does, if i plugin a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EBrand-new Cisco Catalyst Switch to the network and i have not\ngone through statically set the VTP Domain Name\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, with \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVersion 2 it would see a VTP message coming from a neighboring\nSwitch and it would automatically update its Domain Name based on the\nAdvertisement that it receives\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, that seems like \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ebit of a Security issue\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\nWell \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVTP Version 3 forced you to do manual\nConfiguration of your VTP domain and that’s one Security enhancement\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\nbut \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVTP Version 3 also does a better job of a\nsecuring the VTP domain password, \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Eif you set the one of those up,\nand \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVTP version 3 also makes a fundamental change\nin\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, how \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVlan database information\nhas propagated even though we could have multiple Servers in our Switch\ntopology\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, there gonna be \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eone and\nonly one Primary Server in a VTP domain and only that primary Server is able to\nmake updates to other devices,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand\none other thing that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVTP Version 3 brings to the\nTable is support for MST\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, that’s the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVersion of Spanning Tree Protocol that allows us to do\ndefined different instances of Spanning Tree\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand we can say that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethese\nVlans belongs to this instance of Spanning Tree\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethese other Vlans\nbelongs to other instance of Spanning Tree\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVTP Version 3 supports that\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, and one of\nfeature i want to \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eaware that before we go out and\nstart doing the Configuration \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Eand \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eis\nVTP Pruning\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Let’s say that on the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESwitch1 we had Vlans 100,200 and 300\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebut of this Switch5 as an example, let say \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe had couple of Laptops\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethe Laptop1 it\nbelonged to Vlan 100\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, and the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ELaptop2\nbelong to Vlan 200\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003Cbr \/\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-m4SaYPshRh8\/WGPlS2TZIBI\/AAAAAAAADi0\/faOoWqpcYOIcDTjPRRa_sz9u9V_Axye-QCLcB\/s1600\/www.ccnaccnplinux.com%2BVTP%2BTheory00016.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"348\" src=\"https:\/\/1.bp.blogspot.com\/-m4SaYPshRh8\/WGPlS2TZIBI\/AAAAAAAADi0\/faOoWqpcYOIcDTjPRRa_sz9u9V_Axye-QCLcB\/s640\/www.ccnaccnplinux.com%2BVTP%2BTheory00016.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; But nowhere on the Switch,\nto i\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E have nobody belongs to Vlan 300\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebut remember \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethat a\nTrunk by default is going to forward traffic for all of the Vlan’s across that\nTrunk\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand we talked about \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ehow we could administratively create a list of allowed Vlans\nover a Trunk but that’s extra administrative work to do that\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, would\nit be great though that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESwitch5 could say\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\n“\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ei don’t have anybody belonging to Vlan 300\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”,\nso don’t \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Esend me any Vlan 300 traffic over this\nTrunk\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethat’s one of this thing that\nVTP can do for us if there is no Vlan 300 traffic needed\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eif we have \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVTP Pruning\nenabled for that Trunk\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ecan\ndynamically Prun off unneeded Vlans,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ethat’s\nthe theory of VTP, now let see how to set it up in our next session. \u0026nbsp; \u0026nbsp; \u0026nbsp;\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cdiv style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: blue; font-family: Trebuchet MS, sans-serif; font-size: x-large;\"\u003E\u003Ca href=\"https:\/\/drive.google.com\/file\/d\/0Bxhcn6La3ysgb2wwbGVxWTJ4VUU\/view?usp=sharing\" target=\"_blank\"\u003EClick Here To Download The PDF File\u003C\/a\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cbr \/\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"background-color: #faf7f7; color: #444444; font-family: \u0026quot;trebuchet ms\u0026quot;, sans-serif; font-size: 16px; margin: 0px; padding: 0px;\"\u003E\n\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;If You Like the Post. Don’t forget\u0026nbsp;\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"background-color: #faf7f7; color: #444444; font-family: \u0026quot;trebuchet ms\u0026quot;, sans-serif; font-size: 16px; margin: 0px; padding: 0px;\"\u003E\n\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"background-color: #faf7f7; color: #444444; font-family: \u0026quot;trebuchet ms\u0026quot;, sans-serif; font-size: 16px; margin: 0px; padding: 0px;\"\u003E\n\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp;\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003Eto\u0026nbsp;“\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: #0070c0; font-size: 18pt; margin: 0px; padding: 0px;\"\u003ESubscribe\/Share\/Comment\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003E”. Thank You.\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cspan style=\"font-size: 12pt;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp;\u003C\/span\u003E\u003C\/div\u003E\n\u003C\/div\u003E\n"},"link":[{"rel":"replies","type":"application/atom+xml","href":"http:\/\/www.ccnaccnplinux.com\/feeds\/1092871471144386580\/comments\/default","title":"Post Comments"},{"rel":"replies","type":"text/html","href":"http:\/\/www.ccnaccnplinux.com\/2016\/12\/vtp-theory.html#comment-form","title":"0 Comments"},{"rel":"edit","type":"application/atom+xml","href":"http:\/\/www.blogger.com\/feeds\/4366728018987920734\/posts\/default\/1092871471144386580"},{"rel":"self","type":"application/atom+xml","href":"http:\/\/www.blogger.com\/feeds\/4366728018987920734\/posts\/default\/1092871471144386580"},{"rel":"alternate","type":"text/html","href":"http:\/\/www.ccnaccnplinux.com\/2016\/12\/vtp-theory.html","title":"VTP Theory"}],"author":[{"name":{"$t":"Unknown"},"email":{"$t":"noreply@blogger.com"},"gd$image":{"rel":"http://schemas.google.com/g/2005#thumbnail","width":"16","height":"16","src":"https:\/\/img1.blogblog.com\/img\/b16-rounded.gif"}}],"media$thumbnail":{"xmlns$media":"http://search.yahoo.com/mrss/","url":"https:\/\/1.bp.blogspot.com\/-m4SaYPshRh8\/WGPlS2TZIBI\/AAAAAAAADi0\/faOoWqpcYOIcDTjPRRa_sz9u9V_Axye-QCLcB\/s72-c\/www.ccnaccnplinux.com%2BVTP%2BTheory00016.jpg","height":"72","width":"72"},"thr$total":{"$t":"0"}},{"id":{"$t":"tag:blogger.com,1999:blog-4366728018987920734.post-5537938057109021973"},"published":{"$t":"2016-12-19T21:08:00.001+05:30"},"updated":{"$t":"2016-12-19T21:08:03.538+05:30"},"category":[{"scheme":"http://www.blogger.com/atom/ns#","term":"CCNP Switch(300-115 and 642-813)"}],"title":{"type":"text","$t":"Trunking \u0026 Pruning Configuration"},"content":{"type":"html","$t":"\u003Cdiv dir=\"ltr\" style=\"text-align: left;\" trbidi=\"on\"\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cimg src=\"https:\/\/2.bp.blogspot.com\/-bq89ZQDAX20\/WFfxRKZql3I\/AAAAAAAADgg\/Ow-meuKLXNw_JBrm75AqSM0YmhxYHa0XgCLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2B%2526%2BPrunning%2BConfiguation00009.jpg\" \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Now the we talked \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eabout the Theory of Trunking\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, let’s see how to\nset up couple of Trunks, we wanna set up trunk in this session between \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESwitches Sw1 and Sw2\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand\nanother \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETrunk between Sw1 and Sw3\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nfirst see now things are configured now on Sw1, let’s do a\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l8 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1#show interfaces\nfastetherent 1\/0\/13 switchport\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-8M6GRkPMIV0\/WFfveN8EsxI\/AAAAAAAADgI\/EHEHWdSmRzMzuIJT89Yagb_fTpB8YG6pQCLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2B%2526%2BPrunning%2BConfiguation00003.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/2.bp.blogspot.com\/-8M6GRkPMIV0\/WFfveN8EsxI\/AAAAAAAADgI\/EHEHWdSmRzMzuIJT89Yagb_fTpB8YG6pQCLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2B%2526%2BPrunning%2BConfiguation00003.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; It tell us right now\nw\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ee acting as an Access Port that’s our\nOperational Mode\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we are not \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETrunking\ncurrently our mode is set to Dynamic Auto\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we willing to form a\nTrunk if we receive a DTP frame, but it looks like we haven’t received a DTP\nframe \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ebecause we are operating in Access mode\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nand we can \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ealso see that Encapsulation Type,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eif Trunk were to come up is gonna be \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Enegotiated\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E that’s probably not what we want,\nwe probably want to hard cod \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EDot1Q as the\nEncapsulation Type\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, also if we formed a Trunk \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethe Native vlan would be Vlan 1\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E and let’s see\nhow to \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eset that to a non-default Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nkeeping in mind that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eboth ends of a Trunk need to\nagree on the Native Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Let’s hard cod the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETrunking Encapsulation to be Dot1Q on both of these ports,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Elet’s also \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eset the\nNative Vlan to be 100 something other than the default\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe need to make that match on far end Switches.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u003C\/span\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EAnd let’s \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eset up fastethernet 1\/0\/13 on Switch Sw1 with a mode of\nDynamic Desirable\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E that will \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ecause\nto send DTP frames down to Switch Sw2 which is configured for Dynamic Auto that\ngonna cause the formation of Trunk\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand\njust illustrate that settings, the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETrunking mode\nto Trunk also sends those DTP frames\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E we set the mode to \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETrunk on fastetherent 1\/0\/14 and we see that Trunk is formed there\nis well\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u003Cbr \/\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003ETo\nsee if we have any Trunks currently on a Switch, we can do a \u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l8 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1#show interfaces trunk\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l8 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003E\u003Cbr \/\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003ELet’s\ngo into the interface Configuration mode and set the Encapsulation type to\nDot1Q\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"mso-list: l8 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config)#interface\nfastetherent 1\/0\/13\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"mso-list: l8 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-if)#switchport\ntrunk encapsulation dot1q\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u003Cbr \/\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003ELet’s\nalso change the Native Vlan to non-default value, we say we make it to 100\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l2 level1 lfo2; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-if)#switchport\ntrunk native vlan 100\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003ENow\nlet set the mode to Dynamic Desirable\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l2 level1 lfo2; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-if)#switchport\nmode dynamic desirable\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-o3ZR74RvdA0\/WFfv-SPkPKI\/AAAAAAAADgM\/MDFmy-xgnL4ZV3SnITn2TAFiF7IbMcWeACLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2B%2526%2BPrunning%2BConfiguation00004.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"276\" src=\"https:\/\/4.bp.blogspot.com\/-o3ZR74RvdA0\/WFfv-SPkPKI\/AAAAAAAADgM\/MDFmy-xgnL4ZV3SnITn2TAFiF7IbMcWeACLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2B%2526%2BPrunning%2BConfiguation00004.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003ENow configure interface fastetherent\n1\/0\/14\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"mso-list: l8 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config)#interface\nfastetherent 1\/0\/14\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"mso-list: l8 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-if)#switchport\ntrunk encapsulation dot1q\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"mso-list: l8 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-if)#switchport\ntrunk native vlan 100\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"mso-list: l8 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-if)#switchport mode\ntrunk\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: left;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-hhRrvXy4VG4\/WFfwXCxXT7I\/AAAAAAAADgQ\/28bWp1g-WVgSb_Uxji0GStXKjVHfvyexQCLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2B%2526%2BPrunning%2BConfiguation00005.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"226\" src=\"https:\/\/1.bp.blogspot.com\/-hhRrvXy4VG4\/WFfwXCxXT7I\/AAAAAAAADgQ\/28bWp1g-WVgSb_Uxji0GStXKjVHfvyexQCLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2B%2526%2BPrunning%2BConfiguation00005.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;Instead of Dynamic\nDesirable, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETrunk mode gonna also send DTP frames\nthat also gonna bring up Trunk because the other end is set to Dynamic Auto\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003ENow\ngo to Switch Sw2 and make changes on them\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"mso-list: l1 level1 lfo3; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw2(config)#interface\nfastethernet 0\/3\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"mso-list: l1 level1 lfo3; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw2(config-if)#switchport\ntrunk native vlan 100\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"mso-list: l1 level1 lfo3; text-indent: -.25in;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003E\u003Cbr \/\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003ELet’s\ndo same thing on Switch Sw3\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"mso-list: l1 level1 lfo3; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw3(config)#interface\nfastethernet 0\/3\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"mso-list: l1 level1 lfo3; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw3(config-if)#switchport\ntrunk native vlan 100\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u003Cbr \/\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; Now the\nTrunks should be happy, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Elet’s go back to Switch\nSw1 and let’s give that command to show up what Trunks we have currently on the\nSwitch.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l7 level1 lfo4; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EShow interfaces trunk\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-q6TSpDuFe3w\/WFfwueakLMI\/AAAAAAAADgU\/GIsbamw1kmwtFSV2PmgoedOCTsWQ2bHJgCLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2B%2526%2BPrunning%2BConfiguation00006.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"328\" src=\"https:\/\/2.bp.blogspot.com\/-q6TSpDuFe3w\/WFfwueakLMI\/AAAAAAAADgU\/GIsbamw1kmwtFSV2PmgoedOCTsWQ2bHJgCLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2B%2526%2BPrunning%2BConfiguation00006.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;Notice \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethat our Native Vlan is 100 \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Efor each of these\nPorts, notice that we hard coded \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EEncapsulation to\nbe 802.1Q\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand we \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eare currently Trunking for both of these ports\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003E\u003Cbr \/\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EAnd that’s the look at the couple\nof ways of configuring an Ethernet Trunk\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-EHD3It-5ITI\/WFfw9wf4H5I\/AAAAAAAADgY\/IkpAg-5Bfn4A-VnLJMlMzUCTiAUnaJapQCLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2B%2526%2BPrunning%2BConfiguation00007.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" src=\"https:\/\/3.bp.blogspot.com\/-EHD3It-5ITI\/WFfw9wf4H5I\/AAAAAAAADgY\/IkpAg-5Bfn4A-VnLJMlMzUCTiAUnaJapQCLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2B%2526%2BPrunning%2BConfiguation00007.jpg\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;We have \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Enow created Vlans on our Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E we created \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETrunks, set the Trunking encapsulation type to 802.1Q\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nwe \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eset the Native Vlan to a non-default value\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebut something else \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe\nmight want to do Trunks is to limit what Vlan’s are gonna be allowed flow over\nthose Trunks\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, this can help us from a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESecurity Prospective because by default all Vlan’s are\nallowed over a Trunk this means that Unknown unicast, Broadcast and Multicast\ntraffic for all the Vlans flow over a Trunk by default, \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Ethis\nmight open up the opportunity for the Malicious user to capture packets.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; They \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eshould not be seeing and also eliminating the Vlan’s allowed\nover trunks can help us from Quality of Service prospective\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebecause w\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ee don’t have an\nunnecessary packet flowing across the Trunk containing from the Trunks\nBandwidth\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Erather alongside\ntraffic that does need to flow across the trunk\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand here on \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESw1 let’s\ntake a look at, what Vlan’s are allowed over the Trunks we created\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003ELet’s do a Show command\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l4 level1 lfo5; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1#show interfaces trunk\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-ehoLxuLNI8s\/WFfxGfXLe7I\/AAAAAAAADgc\/6EvVVd70ZNkqcOyfutgWGI3ipc6MVsBZQCLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2B%2526%2BPrunning%2BConfiguation00008.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em; text-align: center;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/1.bp.blogspot.com\/-ehoLxuLNI8s\/WFfxGfXLe7I\/AAAAAAAADgc\/6EvVVd70ZNkqcOyfutgWGI3ipc6MVsBZQCLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2B%2526%2BPrunning%2BConfiguation00008.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u003C\/span\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;And we can see that\nfor \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eboth of are Ports we allowing all Vlans and\nrange of 1 through 4094 but \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Eright now the only Vlans that we\nhave on the Switch are Vlan’s 1, 100 and 200 and we see that, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethey are allowed an Active in Management Domain\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nlet say for some reason, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe do not want to allow\nVlan 200 to flow across that Trunk Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, how can we do that,\nlet’s go into interface\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"mso-list: l4 level1 lfo5; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config)#interface\nfastetherent 1\/0\/13\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"mso-list: l4 level1 lfo5; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-if)#switchport\ntrunk allowed vlan \u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"margin-left: 58.5pt; mso-add-space: auto; mso-list: l5 level1 lfo6; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003Eü\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EWord: -\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E is specify the individual Vlans,\nthat are going to be allowed over this trunk Port and \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe just separate the Vlan with a (,) Comma\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe could say 1,100,200 and that would be allowed those 3\nVlans across this Trunk Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"margin-left: 58.5pt; mso-add-space: auto; mso-list: l5 level1 lfo6; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003Eü\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EAdd: -\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif we\njust want to add Vlan in existing or Current Vlan list, we can give the Keyword\nADD\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"margin-left: 58.5pt; mso-add-space: auto; mso-list: l5 level1 lfo6; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003Eü\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EAll: -\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe\ncould say “allow all of Vlans\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"margin-left: 58.5pt; mso-add-space: auto; mso-list: l5 level1 lfo6; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003Eü\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EExcept: -\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E we could say, “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eallowed Vlan except\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E” the following Vlans.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"margin-left: 58.5pt; mso-add-space: auto; mso-list: l5 level1 lfo6; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003Eü\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003ENone: -\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E \u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EDon’t\nallow any one, block all Vlans on this Trunk Port\u003C\/span\u003E\u003C\/u\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"margin-left: 58.5pt; mso-add-space: auto; mso-list: l5 level1 lfo6; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003Eü\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003ERemove: -\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E if we got our current list, w\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ee can surgically remove individual Vlans from Existing or\nCurrent Vlan list, if we wanted to\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EThere is couple of ways of Pruning\nVlans, first let’s use first(Word) approach to we just enter the individual\nVlan numbers\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l0 level1 lfo7; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-if)#switchport\ntrunk allowed vlan 1,100\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003ENow let’s go back and take a look at what\nVlans are allowed on that Port.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l0 level1 lfo7; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1#show interface\nfastetherent 1\/0\/3 trunk\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-bq89ZQDAX20\/WFfxRKZql3I\/AAAAAAAADgg\/Ow-meuKLXNw_JBrm75AqSM0YmhxYHa0XgCLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2B%2526%2BPrunning%2BConfiguation00009.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"348\" src=\"https:\/\/2.bp.blogspot.com\/-bq89ZQDAX20\/WFfxRKZql3I\/AAAAAAAADgg\/Ow-meuKLXNw_JBrm75AqSM0YmhxYHa0XgCLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2B%2526%2BPrunning%2BConfiguation00009.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;Currently though, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit’s only 1 and 100 allowed\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe can see Vlan 200\nis no longer allowed over this Trunk port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit’s only Vlans 1 and 100,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ethat’s \u003Ci\u003E\u003Cu\u003Eone way of setting this up\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u003Cbr \/\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003ELet’s go back into interface and make\nthat Command go away\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"mso-list: l4 level1 lfo5; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config)#interface fastetherent\n1\/0\/13\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"mso-list: l4 level1 lfo5; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-if)# no switchport\ntrunk allowed vlan \u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003ENow let’s try this in a different\nway, let’s say\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"mso-list: l6 level1 lfo8; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1(config-if)#switchport\ntrunk allowed vlan except 200\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"margin-left: 67.5pt; mso-add-space: auto; mso-list: l3 level1 lfo9; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003Eü\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp;\n\u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EAllow all vlan except specific Vlan (200)\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003ENow take a look\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraph\" style=\"mso-list: l0 level1 lfo7; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ESw1#show interface fastetherent\n1\/0\/3 trunk\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-XgG-zYWx-Fo\/WFfxbRgdQEI\/AAAAAAAADgk\/0ilQTU2yuBIqTJ8y8D_ZhFCEBcf2E1kiQCLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2B%2526%2BPrunning%2BConfiguation00010.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-XgG-zYWx-Fo\/WFfxbRgdQEI\/AAAAAAAADgk\/0ilQTU2yuBIqTJ8y8D_ZhFCEBcf2E1kiQCLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2B%2526%2BPrunning%2BConfiguation00010.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;And we can see, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe looking at the allowed Vlan’s on this trunk, it’s 1-199\nand 201-4094\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eonly Vlan that’s\nnot allowed is Vlan 200,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eonly Vlans that are currently allowed an Active are 1 and 100\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\nbecause \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe said allow everything except 200 and\nthat only leaves us with these 2 Vlans.\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EThat’s the look at couple of ways, we\ncan go into a Trunk and Prun of unnecessary Vlan traffic, which we said could\nhelp us with Security as well as Quality of Service.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cu\u003E\u003Ci\u003E\u003Cb\u003E\u003Cspan style=\"color: blue; font-family: Trebuchet MS, sans-serif; font-size: x-large;\"\u003E\u003Ca href=\"https:\/\/drive.google.com\/file\/d\/0Bxhcn6La3ysgQXQ1ZGZUSHJqLXM\/view?usp=sharing\" target=\"_blank\"\u003EClick Here to Download The PDF File\u003C\/a\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/i\u003E\u003C\/u\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cu\u003E\u003Ci\u003E\u003Cb\u003E\u003Cbr \/\u003E\u003C\/b\u003E\u003C\/i\u003E\u003C\/u\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cu\u003E\u003Ci\u003E\u003Cb\u003E\u003Cbr \/\u003E\u003C\/b\u003E\u003C\/i\u003E\u003C\/u\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"background-color: #faf7f7; color: #444444; font-family: \u0026quot;trebuchet ms\u0026quot;, sans-serif; font-size: 16px; margin: 0px; padding: 0px;\"\u003E\n\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;If You Like the Post. Don’t forget\u0026nbsp;\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"background-color: #faf7f7; color: #444444; font-family: \u0026quot;trebuchet ms\u0026quot;, sans-serif; font-size: 16px; margin: 0px; padding: 0px;\"\u003E\n\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"background-color: #faf7f7; color: #444444; font-family: \u0026quot;trebuchet ms\u0026quot;, sans-serif; font-size: 16px; margin: 0px; padding: 0px;\"\u003E\n\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp;\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003Eto\u0026nbsp;“\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: #0070c0; font-size: 18pt; margin: 0px; padding: 0px;\"\u003ESubscribe\/Share\/Comment\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003E”. Thank You.\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003C\/div\u003E\n"},"link":[{"rel":"replies","type":"application/atom+xml","href":"http:\/\/www.ccnaccnplinux.com\/feeds\/5537938057109021973\/comments\/default","title":"Post Comments"},{"rel":"replies","type":"text/html","href":"http:\/\/www.ccnaccnplinux.com\/2016\/12\/trunking-pruning-configuration.html#comment-form","title":"1 Comments"},{"rel":"edit","type":"application/atom+xml","href":"http:\/\/www.blogger.com\/feeds\/4366728018987920734\/posts\/default\/5537938057109021973"},{"rel":"self","type":"application/atom+xml","href":"http:\/\/www.blogger.com\/feeds\/4366728018987920734\/posts\/default\/5537938057109021973"},{"rel":"alternate","type":"text/html","href":"http:\/\/www.ccnaccnplinux.com\/2016\/12\/trunking-pruning-configuration.html","title":"Trunking \u0026 Pruning Configuration"}],"author":[{"name":{"$t":"Unknown"},"email":{"$t":"noreply@blogger.com"},"gd$image":{"rel":"http://schemas.google.com/g/2005#thumbnail","width":"16","height":"16","src":"https:\/\/img1.blogblog.com\/img\/b16-rounded.gif"}}],"media$thumbnail":{"xmlns$media":"http://search.yahoo.com/mrss/","url":"https:\/\/2.bp.blogspot.com\/-bq89ZQDAX20\/WFfxRKZql3I\/AAAAAAAADgg\/Ow-meuKLXNw_JBrm75AqSM0YmhxYHa0XgCLcB\/s72-c\/www.ccnaccnplinux.com%2BTrunking%2B%2526%2BPrunning%2BConfiguation00009.jpg","height":"72","width":"72"},"thr$total":{"$t":"1"}},{"id":{"$t":"tag:blogger.com,1999:blog-4366728018987920734.post-6188055662102648707"},"published":{"$t":"2016-12-13T22:53:00.000+05:30"},"updated":{"$t":"2016-12-14T11:19:05.695+05:30"},"category":[{"scheme":"http://www.blogger.com/atom/ns#","term":"CCNP Switch(300-115 and 642-813)"}],"title":{"type":"text","$t":"Trunking Theory"},"content":{"type":"html","$t":"\u003Cdiv dir=\"ltr\" style=\"text-align: left;\" trbidi=\"on\"\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; display: inline !important; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-bC-zsRueBn8\/WFAoNoIamNI\/AAAAAAAADfg\/_IB6riBjLdkvGpr8Bz_KG8r8MH8zeibSwCEw\/s1600\/www.ccnaccnplinux.com%2BTrunking%2BTheory00022.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-bC-zsRueBn8\/WFAoNoIamNI\/AAAAAAAADfg\/_IB6riBjLdkvGpr8Bz_KG8r8MH8zeibSwCEw\/s640\/www.ccnaccnplinux.com%2BTrunking%2BTheory00022.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;When we were talking about\nVlan’s we said \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethat a way that we could\ninterconnect Switches if those Switches had multiple Vlans\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewas to dedicate a Port on each Switch for each Vlan for\nexample\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, if i am going from the Floor 2 Switch on picture.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-0_m9XF2GV4s\/WFAl9ea8E2I\/AAAAAAAADeI\/Nd9dOOg_-3YJ842kKOgYEGsfOSNExX7mgCLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2BTheory00002.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-0_m9XF2GV4s\/WFAl9ea8E2I\/AAAAAAAADeI\/Nd9dOOg_-3YJ842kKOgYEGsfOSNExX7mgCLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2BTheory00002.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp;\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EDown to the Floor 1 Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\ni might have a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EPort on Floor 2, that was\ndedicated for the Accounting Vlan and Port on the Floor1 Switch that dedicated\nfor the Accounting Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, similarly i might have a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EPort that’s dedicated for the Sales vlan and as you see\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\ni have just got a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ecouple of Switches with a\ncouple of Vlans this is not gonna scale very.\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\nWell for example, the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EFloor1 Switch is\nalso got a Port Dedicated for just for the Sales Vlan and its gonna have a Port\ndedicated just for the Accounting Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eto\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eget down to this Router\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-dQk2RW69JSM\/WFAmGgL5QtI\/AAAAAAAADeM\/8uTQYf-eyMEARjT6qgiwGNPlpYFboGejwCLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2BTheory00003.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/1.bp.blogspot.com\/-dQk2RW69JSM\/WFAmGgL5QtI\/AAAAAAAADeM\/8uTQYf-eyMEARjT6qgiwGNPlpYFboGejwCLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2BTheory00003.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp;\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EIt’s already using up 4 Ports for just to get to other infrastructure\ndevices\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand a solution to a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Esituation like this is to use Trunk Ports\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-8EBlip9_YP4\/WFAmNTVpthI\/AAAAAAAADeQ\/H0rfrPQoBh8F4UIO65NKGGOJZkf7L76YACLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2BTheory00004.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-8EBlip9_YP4\/WFAmNTVpthI\/AAAAAAAADeQ\/H0rfrPQoBh8F4UIO65NKGGOJZkf7L76YACLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2BTheory00004.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;And the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETrunk ports is as supposed to an Access Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand, “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EAn Access Port\ntypically has one and only one Vlan Associated with it but a Special Trunk Port\ncan have Multiple Vlans flowing over that port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E” we can have \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EAccounting traffic, Sales traffic peacefully co-existing on\nthis same Single Link\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESingle\nTrunk One Link\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand if we had 10\nVlans, can you imagine that\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E, how many number of\nports we would save there\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E instead of \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ededicating 10 ports one per vlan, now we just One Port a Trunk\nPort, and that Single Trunk Port can carry traffic for Multiple Vlans.\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\nThere is a question that first comes up though that is, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ehow we determined the Vlan to which our frame belong\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\nfor example of, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe have 2nd Accounting Computer\non Floor1 and its sends out a Packet going to the 1\u003Csup\u003Est\u003C\/sup\u003E Accounting\nComputer on Floor2\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit’s gonna go\ninto the Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E and \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EFloor 1 Switch\nis gonna send a Packet up the Trunk or the Frame is gonna be sent up the Trunk\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-BObu3fsan0M\/WFAmU0ROAKI\/AAAAAAAADeU\/MFB3Po-rpiMkcJaRLcA_TFBmbMYVywAcwCLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2BTheory00005.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/4.bp.blogspot.com\/-BObu3fsan0M\/WFAmU0ROAKI\/AAAAAAAADeU\/MFB3Po-rpiMkcJaRLcA_TFBmbMYVywAcwCLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2BTheory00005.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp;\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EWhen\nit gets to this Point on this Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, how does that Switch know,\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethe Vlan to which that frame belongs. \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003EWell\nwhat we can do is, to\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E Color or to Tag our frames\nto indicate that frames Vlan membership \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Ein our example, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethe Floor 2 Switch receives that frame\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E and it\nhas no question about, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewhere that frame is destined,\nit looks at the Tag and it says\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003E“\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EOh! this is a Blue Frame or maybe it’s in Vlan 100\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”\nand it knows, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit needs to go out a Vlan 100 Port\nand we gonna send that frame out to the destination PC\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E in the\nAccounting Vlan.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-atOaGxxb9pc\/WFAsCjDeOBI\/AAAAAAAADfk\/n-eSptrnKoAQmNN4L-_m8gz63qie-TMzACLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2BTheory00031.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/4.bp.blogspot.com\/-atOaGxxb9pc\/WFAsCjDeOBI\/AAAAAAAADfk\/n-eSptrnKoAQmNN4L-_m8gz63qie-TMzACLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2BTheory00031.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;And many of our Cisco\nSwitches \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Esupport a couple of different Trunking\ntypes\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe have the Cisco proprietary\nISL the Inter-Switch Link Trunking type\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-4GJcnWQhnWg\/WFAsHodCmpI\/AAAAAAAADfo\/lOBdfwuzsagsR8DEkvBFmZ4nE0wNBaUwACLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2BTheory00006.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/1.bp.blogspot.com\/-4GJcnWQhnWg\/WFAsHodCmpI\/AAAAAAAADfo\/lOBdfwuzsagsR8DEkvBFmZ4nE0wNBaUwACLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2BTheory00006.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;Interestingly Cisco use to\nprompt this as the preferred type of Trunk, but now Cisco is suggesting now \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe use the industry standard 802.1Q that the Ethernet\nTrunking type\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, that we typically see \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit’s IEEE 802.1Q commonly called “A Dot1Q Trunk”\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\nfor short.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-6ztb9SoBl_w\/WFAsMyvmNaI\/AAAAAAAADfs\/c2oZGf2xU5IYZx6QwL2eT0ife34BDt8xgCLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2BTheory00008.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-6ztb9SoBl_w\/WFAsMyvmNaI\/AAAAAAAADfs\/c2oZGf2xU5IYZx6QwL2eT0ife34BDt8xgCLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2BTheory00008.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;Now little bit \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Emore specific about how the Tagging\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, how \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethe coloring over frame on Dot1Q Trunk actually works\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-AGOKHAOu3Y0\/WFAm-bs6LMI\/AAAAAAAADek\/R5J4Cy7N6MMjXjW6v1x5X7f9WvUBcP6MwCLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2BTheory00009.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/4.bp.blogspot.com\/-AGOKHAOu3Y0\/WFAm-bs6LMI\/AAAAAAAADek\/R5J4Cy7N6MMjXjW6v1x5X7f9WvUBcP6MwCLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2BTheory00009.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; On picture, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe single format of an IEEE 802.1Q Frame\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ein addition to the fields making up an Ethernet\nframe, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Enotice that we have 4 Bytes\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\nor \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E4 Tagged Bytes have been added.\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"margin-left: 38.8pt; mso-add-space: auto; mso-list: l0 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003E2 Tag Protocol Identifier Bytes\n\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"margin-left: 38.8pt; mso-add-space: auto; mso-list: l0 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"color: red; font-family: \u0026quot;wingdings\u0026quot;; font-size: 12.0pt; line-height: 107%;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;times new roman\u0026quot;; font-size: 7pt; font-stretch: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003E2 Tag Controller Identifier\nBytes\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; And \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Einside of these 4 Bytes\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ehave 12 Bits set indicating to Vlan ID\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-YGs9RythNR0\/WFAnHidp1pI\/AAAAAAAADeo\/Nk1cB4LsFd0RWe1iabmlCpvSGAVjuVEtwCLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2BTheory00010.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-YGs9RythNR0\/WFAnHidp1pI\/AAAAAAAADeo\/Nk1cB4LsFd0RWe1iabmlCpvSGAVjuVEtwCLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2BTheory00010.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;And we have \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E3 Bits that indicate the Priority\nof this frame\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethese bits are\ncalled the “COS\u003C\/span\u003E”\u003Cspan style=\"color: red;\"\u003E or the Class of Service Bits\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-rn3BHulVPT4\/WFAnUnOEAVI\/AAAAAAAADew\/Shvzx3THNQQ1tDWC94nl_Oaqg90_2bi8gCLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2BTheory00032.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/4.bp.blogspot.com\/-rn3BHulVPT4\/WFAnUnOEAVI\/AAAAAAAADew\/Shvzx3THNQQ1tDWC94nl_Oaqg90_2bi8gCLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2BTheory00032.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: left;\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\nBut \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethese Bits there are 3 of them\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nthey \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ecan indicate the Priority of our frame\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\nthink about \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ehow many possible values do we have\nif we have 3 Bits are disposal of 2\u003Csup\u003E3\u003C\/sup\u003E =8,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ewe \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Egot 8 possible\nvalues and that gonna be in a range of 0-7\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; However Cisco says “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe should not use the Values of 6 and 7 they reserved for\nNetworks use”\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E meaning that on our Networks, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe should not configure any traffic other than possibly Routing\ntraffic\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, as having \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ea COS value\ngreater then 5\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, typically if \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe\ndoing something like Voice over our Network that Voice media is gonna be given\na COS value of 5\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand we said that\nwe gonna be \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eadding 4 Bytes to these frame going\nover a Dot1q Trunk,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E12 Bits inside of those 4 Bytes are gonna be indicating the\nVlan ID. Well, there is a Special Vlan called the Native Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-l7GdWtkGJyM\/WFAnNNggWDI\/AAAAAAAADes\/gsk07q-SrRMXwC_Rg_d7d0yk7xikYVa0gCLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2BTheory00012.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em; text-align: center;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-l7GdWtkGJyM\/WFAnNNggWDI\/AAAAAAAADes\/gsk07q-SrRMXwC_Rg_d7d0yk7xikYVa0gCLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2BTheory00012.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; The \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ENative Vlan does not have these extra Bytes\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nits \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EUntagged Vlan and by default on our Cisco Catalyst\nSwitches that Native Vlan default to Vlan 1\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, however we can\nchange it, here is a big point, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif we do change\nit, we want the Switches at each end of this Trunk to agree on what is the\nNative Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, let’s say that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe had\none Switch configured with Native Vlan of 100 and it connected over a Trunk to\nanother Switch, but that other Switch was configured with Native Vlan of 200, \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Ewhat\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewould happen if we sent from our original Switch\na frame is a member of Vlan 100\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\nWell \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethat original Switch Vlan 100 is the\nNative Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit’s gonna be Untagged\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ewhen it \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ereaches the\nSecond Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, the Second Switch is gonna look at it and say “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EOh! this is an Untagged Frame, this must belong to the Native\nVlan of 200 according to that other Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”, that allow us to do\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Esomething called Vlan Hopping \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Egoing\nfrom \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eone Vlan to another Vlan because the\nSwitches don’t agree on who should be the Native Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we don’t\nwant to do that we wanna make sure that, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethe\nSwitches that each end of Trunk agree on the Native Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, and in\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eupcoming session we gonna see how to configure a\nNative Vlan on a Trunk\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, and we also gonna \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Esee how to configure Trunks\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u003Cu\u003E\u0026nbsp;Interestingly Trunks can be dynamically\nnegotiated and Broad up between couple of Switches, we can have Switchport set\nto different Trunking modes\u003C\/u\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E, let’s see how it works.\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E\u0026nbsp;Let’s imagine that we have these two Switches\ninterconnected with a link\u003C\/span\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-vL4is9lXEXs\/WFAnf4m4wxI\/AAAAAAAADe0\/sRd91J_u_K86N7IsKBTHVvtMbvfa52gxQCLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2BTheory00014.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-vL4is9lXEXs\/WFAnf4m4wxI\/AAAAAAAADe0\/sRd91J_u_K86N7IsKBTHVvtMbvfa52gxQCLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2BTheory00014.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;And we want to \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eform a Trunk between these\nSwitches\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe have different\nTrunking modes that we can configure on the Switch Ports,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E here\nthey are as a reference for you we got these 4 modes.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-I1ZEE6_SAao\/WFAnmiA1xQI\/AAAAAAAADe4\/PPmQHoZJBh8gD9_OyZXj2mehy2ZiR4HLwCLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2BTheory00015.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/4.bp.blogspot.com\/-I1ZEE6_SAao\/WFAnmiA1xQI\/AAAAAAAADe4\/PPmQHoZJBh8gD9_OyZXj2mehy2ZiR4HLwCLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2BTheory00015.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;If we tell a Port that you\nare an \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EAccess Port, it is not going to be a Trunk\nPorts\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, it’s going to be an \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EAccess\nPort which usually means that its only gonna be participated on a single \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003EVlan\nbecause usually means, there is an exception with Voice Vlans there we talked\nabout later but \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Etypically an Access Port belongs\nto one and only one Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; If we tell a Port that “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EHey! You are Trunk Port”,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003Ci\u003E\u003Cu\u003Ethat means it’s a Trunk Port really doesn’t matter what\nthe other side is doing, that\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EPort\nis gonna be a Trunk Port but we can have a Trunk dynamic formed between 2\nSwitches that are willing to form a Trunk on their Ports\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; We can have either the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EDynamic Desirable Mode set on a Port or Dynamic Auto\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nthe way a Trunk is dynamically formed is using a Protocol a called “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EDTP” or Dynamic Trunking Protocol”\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-XnaIZSdljDM\/WFAntWiRpiI\/AAAAAAAADe8\/3-st1wKnKRkAqH-rmgbD5JLN8FlOuR4pQCLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2BTheory00016.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/4.bp.blogspot.com\/-XnaIZSdljDM\/WFAntWiRpiI\/AAAAAAAADe8\/3-st1wKnKRkAqH-rmgbD5JLN8FlOuR4pQCLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2BTheory00016.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;And b\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eoth the Trunk and the Dynamic Desirable modes will send DTP\nFrames to the other side,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif a\nDynamic Desirable or a Dynamic Auto Port receives a DTP frame\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nit knows that “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EHey! The other side of this link\nis wants to become a Trunk\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E” and we are good with that, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Elet’s form a Trunk.\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Notice thought the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETrunk Mode and Dynamic Desirable they originate DTP frames,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ethe \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EDynamic Auto Mode\ndoes not, its wiling to become a Trunk if it happens to receive a DTP frame but\nit’s not gonna send one that’s the difference between Dynamic Desirable and Dynamic\nAuto\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003E\u003Cbr \/\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EAnd all of these different\nModes, let’s check out different combination and permutation that we might have,\nand ask will a Trunk will formed with different combination of Trunking Modes\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;If we have \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eone side of our link set to the Access Mode,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Efor example \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif Switch\nSw1 set to the Access Mode and really doesn’t matter what Switch Sw2 is set to\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebecause a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETrunk is not\ngonna be formed\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E in that case, because \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe told one side it doesn’t matter if you receive DTP frame you\nare in Access Port \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Eand if we hard code \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eone side to be an Access Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit’s not gonna be Trunk\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-BKsTwrTOSE4\/WFAn4L7C6nI\/AAAAAAAADfA\/vQBjdY5e0VUB7pwUt-4_6ZV9VPk-I1A8gCLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2BTheory00017.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/2.bp.blogspot.com\/-BKsTwrTOSE4\/WFAn4L7C6nI\/AAAAAAAADfA\/vQBjdY5e0VUB7pwUt-4_6ZV9VPk-I1A8gCLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2BTheory00017.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;What if \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eone Side is set to Trunk and the other side is set to either\nDynamic Desirable or Dynamic Auto,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E and \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eeither case a Trunk is going to be formed\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nremember that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EPort configured for Trunk mode is\ngoing to send a DTP frames and either a Dynamic Desirable or a Dynamic Auto\nport will form a Trunk if it receives a DTP frames, and it’s gonna be receiving\nthe DTP frames from the other side of the link configured as a Trunk\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-WoOY2NoQNmE\/WFAn-VCtgeI\/AAAAAAAADfE\/875PIkdUTc8DPA-ue7Ldwpk2CwBJpUTLgCLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2BTheory00018.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-WoOY2NoQNmE\/WFAn-VCtgeI\/AAAAAAAADfE\/875PIkdUTc8DPA-ue7Ldwpk2CwBJpUTLgCLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2BTheory00018.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; And if both side is set\nto Trunk obviously, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ea Trunk is gonna be formed\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nit really doesn’t matter, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethat they happen to be\nsending a DTP frames, they are not looking for DTP frames\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E there \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eare just both independently told\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, you are \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETrunk and as a result we gonna have a Trunk between those\nSwitches\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-s3K583jNp_I\/WFAoCjDtyEI\/AAAAAAAADfI\/ilonU3dPq084iGU2mpHawMhMYI-rNiTxQCLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2BTheory00019.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/4.bp.blogspot.com\/-s3K583jNp_I\/WFAoCjDtyEI\/AAAAAAAADfI\/ilonU3dPq084iGU2mpHawMhMYI-rNiTxQCLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2BTheory00019.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u003Cbr \/\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;And it’s get bit a trickier though, when we\nget to the different Dynamic modes for example, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EDynamic\nDesirable on both sides will a Trunk be formed here\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, actually YES\nremember what Dynamic desirable does, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit’s desiring\nto set it to Trunk and as a result it’s going to initiate, it’s going to send\nDTP frames the other side is gonna see the DTP frames\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand say “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EGreat! let’s\nbe a Trunk\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”, and \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ETrunk is gonna be\nformed\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-Ptl0BkbU_tk\/WFAoGDGBawI\/AAAAAAAADfM\/resIo0ZM58kz514zYboZSAymKjNcs6ijQCLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2BTheory00020.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/2.bp.blogspot.com\/-Ptl0BkbU_tk\/WFAoGDGBawI\/AAAAAAAADfM\/resIo0ZM58kz514zYboZSAymKjNcs6ijQCLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2BTheory00020.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; What about \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EDynamic Desirable on one side and Dynamic Auto on the other\nside\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, well \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EDynamic Desirable is\ngonna be sending DTP frames but Dynamic Auto port is not going to be sending \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Eor\nwe should say “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit’s not going to be initiating DTP\nframes but when it receives the DTP frames from the Dynamic Desirable side\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”\nit gonna say “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EOh! the other side want to be a\nTrunk, i am willing to do that”\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, let’s form a Trunk and Trunk is\ngoing to formed.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-gnQbd9dj5Y0\/WFAoKWwqn2I\/AAAAAAAADfQ\/Pai920N4iIEK9NJ8cRpzXVh5xkZyPZWIwCLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2BTheory00021.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-gnQbd9dj5Y0\/WFAoKWwqn2I\/AAAAAAAADfQ\/Pai920N4iIEK9NJ8cRpzXVh5xkZyPZWIwCLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2BTheory00021.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u003Cbr \/\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; But \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif both sides are set to Dynamic Auto\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, and\nthat case \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eboth Ports are willing to form a Trunk\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\nhowever, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eno one is initiating it\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eneither side is going to initiate a DTP frame\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\nand as a result, even though both sides are willing, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ea Trunk is not going to be formed\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-bC-zsRueBn8\/WFAoNoIamNI\/AAAAAAAADfU\/44Tx_JWRqogA6L4nm_jHeCylr9xIIKtCACLcB\/s1600\/www.ccnaccnplinux.com%2BTrunking%2BTheory00022.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/4.bp.blogspot.com\/-bC-zsRueBn8\/WFAoNoIamNI\/AAAAAAAADfU\/44Tx_JWRqogA6L4nm_jHeCylr9xIIKtCACLcB\/s640\/www.ccnaccnplinux.com%2BTrunking%2BTheory00022.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EThose are some different ways\nthat we can Dynamically and Statically form a Trunk between a couple of Cisco Catalyst\nSwitches\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cspan style=\"color: blue; font-family: \u0026quot;trebuchet ms\u0026quot; , sans-serif; font-size: x-large;\"\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Ca href=\"https:\/\/drive.google.com\/file\/d\/0Bxhcn6La3ysgQUNNeU9TRjZYN00\/view?usp=sharing\" target=\"_blank\"\u003EClick Here To Download The PDF File\u003C\/a\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/span\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cspan style=\"color: blue; font-family: \u0026quot;trebuchet ms\u0026quot; , sans-serif; font-size: x-large;\"\u003E\u003Cb\u003E\u003Ci\u003E\u003Cbr \/\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/span\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"background-color: #faf7f7; color: #444444; font-family: \u0026quot;trebuchet ms\u0026quot;, sans-serif; font-size: 16px; margin: 0px; padding: 0px;\"\u003E\n\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;If You Like the Post. Don’t forget\u0026nbsp;\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"background-color: #faf7f7; color: #444444; font-family: \u0026quot;trebuchet ms\u0026quot;, sans-serif; font-size: 16px; margin: 0px; padding: 0px;\"\u003E\n\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"background-color: #faf7f7; color: #444444; font-family: \u0026quot;trebuchet ms\u0026quot;, sans-serif; font-size: 16px; margin: 0px; padding: 0px;\"\u003E\n\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp;\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003Eto\u0026nbsp;“\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: #0070c0; font-size: 18pt; margin: 0px; padding: 0px;\"\u003ESubscribe\/Share\/Comment\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003E”. Thank You.\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003C\/div\u003E\n"},"link":[{"rel":"replies","type":"application/atom+xml","href":"http:\/\/www.ccnaccnplinux.com\/feeds\/6188055662102648707\/comments\/default","title":"Post Comments"},{"rel":"replies","type":"text/html","href":"http:\/\/www.ccnaccnplinux.com\/2016\/12\/trunking-theory.html#comment-form","title":"0 Comments"},{"rel":"edit","type":"application/atom+xml","href":"http:\/\/www.blogger.com\/feeds\/4366728018987920734\/posts\/default\/6188055662102648707"},{"rel":"self","type":"application/atom+xml","href":"http:\/\/www.blogger.com\/feeds\/4366728018987920734\/posts\/default\/6188055662102648707"},{"rel":"alternate","type":"text/html","href":"http:\/\/www.ccnaccnplinux.com\/2016\/12\/trunking-theory.html","title":"Trunking Theory"}],"author":[{"name":{"$t":"Unknown"},"email":{"$t":"noreply@blogger.com"},"gd$image":{"rel":"http://schemas.google.com/g/2005#thumbnail","width":"16","height":"16","src":"https:\/\/img1.blogblog.com\/img\/b16-rounded.gif"}}],"media$thumbnail":{"xmlns$media":"http://search.yahoo.com/mrss/","url":"https:\/\/3.bp.blogspot.com\/-bC-zsRueBn8\/WFAoNoIamNI\/AAAAAAAADfg\/_IB6riBjLdkvGpr8Bz_KG8r8MH8zeibSwCEw\/s72-c\/www.ccnaccnplinux.com%2BTrunking%2BTheory00022.jpg","height":"72","width":"72"},"thr$total":{"$t":"0"}},{"id":{"$t":"tag:blogger.com,1999:blog-4366728018987920734.post-8009314042249589904"},"published":{"$t":"2016-12-08T22:21:00.001+05:30"},"updated":{"$t":"2021-02-09T10:34:46.257+05:30"},"category":[{"scheme":"http://www.blogger.com/atom/ns#","term":"CCNP Switch(300-115 and 642-813)"}],"title":{"type":"text","$t":"VLAN Theory"},"content":{"type":"html","$t":"\u003Cdiv dir=\"ltr\" style=\"text-align: left;\" trbidi=\"on\"\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cimg src=\"https:\/\/3.bp.blogspot.com\/-mo2J_TfdF74\/WEmLvwFIQiI\/AAAAAAAADcg\/Z2Fip1QcPgEi2iUnR8PYkyFpxYqCHj88gCLcB\/s640\/www.ccnaccnplinux.com%2BVlan%2BTheory00001.jpg\" \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; Let’s begin our\ndiscussion of Vlan’s and VTP and Trunks by reviewing the basics of Vlan’s, that\nwe talk about back in our CCNA Studies, let’s remember what life is like\nwithout Vlan’s, instead of \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ehaving Ethernet\nSwitches we had Ethernet Hubs\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, and we would go into a building\nthat would be a wiring closure on each floor of building, look like in this\nexample on Picture.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-mo2J_TfdF74\/WEmLvwFIQiI\/AAAAAAAADcg\/Z2Fip1QcPgEi2iUnR8PYkyFpxYqCHj88gCLcB\/s1600\/www.ccnaccnplinux.com%2BVlan%2BTheory00001.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em; text-align: center;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-mo2J_TfdF74\/WEmLvwFIQiI\/AAAAAAAADcg\/Z2Fip1QcPgEi2iUnR8PYkyFpxYqCHj88gCLcB\/s640\/www.ccnaccnplinux.com%2BVlan%2BTheory00001.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; Where we have couple of floors and if we\nwanted to separate departments that co-exists on floor, we would need to give\neach department their own Hub, here you notice that i got a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESwitch on floor2 dedicated to sales “S” represent Sales\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ei got another switch to represent Accounting “A”\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\nand same thing on floor1, i got a sales Switch and an Accounting Switch and if\ni have a 1\u003Csup\u003Est\u003C\/sup\u003E Accounting computer that was to talk to this 2\u003Csup\u003End\u003C\/sup\u003E\nAccounting computer, how traffic will go.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u0026nbsp;\u0026nbsp;\u0026nbsp;Well the traffic is \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Egonna go into that Floor2 Accounting Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Edown to the Floor 1 Accounting Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, then \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eout to the 2\u003Csup\u003End\u003C\/sup\u003E Accounting computer\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-nBnM4Vhtd1o\/WEmL5vOjEDI\/AAAAAAAADck\/vbhGW8666NMf6HdXKeLqe7WI6Yz56fDcgCLcB\/s1600\/www.ccnaccnplinux.com%2BVlan%2BTheory00002.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/2.bp.blogspot.com\/-nBnM4Vhtd1o\/WEmL5vOjEDI\/AAAAAAAADck\/vbhGW8666NMf6HdXKeLqe7WI6Yz56fDcgCLcB\/s640\/www.ccnaccnplinux.com%2BVlan%2BTheory00002.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: left;\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;If i want to talk between an\nAccounting and Sales, there in different subnets, notice this they going into a\ndifferent Router Ports, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ei got a Port going to my\nRouter “S” just for Sales,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand\nother Port \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ejust for Accounting “A”\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\nIf i want to go from \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E1\u003Csup\u003Est\u003C\/sup\u003E Accounting\ncomputer to this 2\u003Csup\u003End\u003C\/sup\u003E Sales computer\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, how i do that.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\nWell my Packet is going to go into the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EAccounting\nSwitch on the Second Floor\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, then it would go down to the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EAccounting Switch on the First floor\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, then its\ngonna \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ego out to the Router\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-SbFeZ4pCGVk\/WEmMB50UaWI\/AAAAAAAADco\/MPPzD0bCB_k8cmWZBVtPGOxXNmOfIEi3ACLcB\/s1600\/www.ccnaccnplinux.com%2BVlan%2BTheory00003.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-SbFeZ4pCGVk\/WEmMB50UaWI\/AAAAAAAADco\/MPPzD0bCB_k8cmWZBVtPGOxXNmOfIEi3ACLcB\/s640\/www.ccnaccnplinux.com%2BVlan%2BTheory00003.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;Because \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe have to Route between subnets\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, their \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ERouter is gonna then route me to the Sales subnet\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit’s gonna go up to\nthe First-Floor Sales Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, then it gonna \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ego out to the Sales 2\u003Csup\u003End\u003C\/sup\u003E Computer on the First Floor\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-9BO5TIPH8Gw\/WEmMJKlUdJI\/AAAAAAAADcs\/AYa84DNOZ1w3AyGwZ9PMfQrPlR8kQdDhQCLcB\/s1600\/www.ccnaccnplinux.com%2BVlan%2BTheory00004.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/2.bp.blogspot.com\/-9BO5TIPH8Gw\/WEmMJKlUdJI\/AAAAAAAADcs\/AYa84DNOZ1w3AyGwZ9PMfQrPlR8kQdDhQCLcB\/s640\/www.ccnaccnplinux.com%2BVlan%2BTheory00004.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; And i \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethink it’s obvious that this type of\nsolution doesn’t scale very well\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, i have only got 2 different\ndepartments. What if i had \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E5 Departments on each\nFloor\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, and \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ei had 10 Floors\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\nSuddenly, we have lots of Ethernet Hubs in this building, fortunately we can\ntake \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EEthernet Switches and group the Ports into\ndifferent Vlan’s, different Virtual Lan’s\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, Infect let’s do that\nwith this topology, let’s \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ehave a single Switch on\nFloor2, and the single Switch on Floor1\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand\nsimply take the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EPorts on those individual\nSwitches on Floors, and carved them up into the Separate Vlan’s\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-oLyjjiELGZI\/WEmMPRvY8HI\/AAAAAAAADcw\/Mj3WuV2Wsuckhdcr8q97WgZXLD_9nvpAACLcB\/s1600\/www.ccnaccnplinux.com%2BVlan%2BTheory00005.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/2.bp.blogspot.com\/-oLyjjiELGZI\/WEmMPRvY8HI\/AAAAAAAADcw\/Mj3WuV2Wsuckhdcr8q97WgZXLD_9nvpAACLcB\/s640\/www.ccnaccnplinux.com%2BVlan%2BTheory00005.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; Things are already starting\nto look better to this topology, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe don’t have as\nmany Switches on each Floor of Building\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we able to\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E support Multiple Subnet or Multiple Vlan’s on a single\nSwitch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, this \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E1\u003Csup\u003Est\u003C\/sup\u003E\nAccounting computer it’s going into a Switchport, that is part of the Accounting\nVlan \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Ethis \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E1st Sales computer it’s\ngoing into a Port that’s the part of Sales Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, and if wanted\nto \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Esend traffic from this 1\u003Csup\u003Est\u003C\/sup\u003E Sales Computer\nto this 2nd Accounting Computer\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ewhat\nwe can do.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; We would \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ego into our Sales Port on the Floor2 Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nand still we assuming that we \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ehave a Port that’s\ngoing out for Sales\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EPort that’s\ngoing out for Accounting\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we would go \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eout of the Sales Port down to Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, again we\ngot an \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eoutgoing port for Sales, and Port for\nAccounting\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewould go out of the\nSales Port down to the Routers\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we have Route between \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVlan’s between subnets\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-wQL7MY4RVJ4\/WEmMdIBtHSI\/AAAAAAAADc4\/qtRXQkqZUPwGqiIFT6N2RTHDlkBVAaSSACLcB\/s1600\/www.ccnaccnplinux.com%2BVlan%2BTheory00007.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/4.bp.blogspot.com\/-wQL7MY4RVJ4\/WEmMdIBtHSI\/AAAAAAAADc4\/qtRXQkqZUPwGqiIFT6N2RTHDlkBVAaSSACLcB\/s640\/www.ccnaccnplinux.com%2BVlan%2BTheory00007.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; We \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewould go back into the Floor1 Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nand we would go \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eout to this 2nd Accounting Computer\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-qQsc6VNw7Sw\/WEmMjmDa8pI\/AAAAAAAADc8\/2G3nvmo12DUDUj8CytRPVyjXmS9qMaGRwCLcB\/s1600\/www.ccnaccnplinux.com%2BVlan%2BTheory00008.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/2.bp.blogspot.com\/-qQsc6VNw7Sw\/WEmMjmDa8pI\/AAAAAAAADc8\/2G3nvmo12DUDUj8CytRPVyjXmS9qMaGRwCLcB\/s640\/www.ccnaccnplinux.com%2BVlan%2BTheory00008.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EAnd by taking these Switches on each floor and carving the Ports\ninto the separate Vlan’s.\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"mso-list: l0 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EWe getting some Security\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpMiddle\" style=\"mso-list: l0 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EWe get Vlan Separation\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"mso-list: l0 level1 lfo1; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp; \u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EWe get different Broadcast Domains.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: justify;\"\u003E\n\u003Cb style=\"text-align: left;\"\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;Infect we can often think of\nthese terms synonymously, \u003Cspan style=\"color: red;\"\u003Ea Vlan typically equal a Subnet\u003C\/span\u003E\nand equal to \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EBroadcast Domain\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: justify;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-hVl1Z4q1RzU\/WEmMqvkB4cI\/AAAAAAAADdE\/fwAYm1shxXEMFkkKfC_aPOUWs5dPWR9TQCLcB\/s1600\/www.ccnaccnplinux.com%2BVlan%2BTheory00009.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em; text-align: center;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/4.bp.blogspot.com\/-hVl1Z4q1RzU\/WEmMqvkB4cI\/AAAAAAAADdE\/fwAYm1shxXEMFkkKfC_aPOUWs5dPWR9TQCLcB\/s640\/www.ccnaccnplinux.com%2BVlan%2BTheory00009.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; A \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EBroadcast seen in the Accounting Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, it’s \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Enot gonna be seen in the Sales Vlan,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand hopefully you can see where the discussion is\ngoing based on your CCNA Studies, even though \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe\ngot Multiple Vlan’s on a Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E which is fantastic, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe still have little bit scalability limitation here\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\nbecause we having to dedicate a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESwitchport to\ninterconnect with another Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E just \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Efor the Sales Vlan,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E and another Port to\nconnect to with \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eanother Switch just for the\nAccounting Vlan\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Later on, in this\nmodule we talk about the formation of a Trunk, remember what a Trunk does from\nyour CCNA Studies, “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ea Trunk is going to allows to\nhave a single connection between Switches and that single connection is gonna be\nable to carry traffic for multiple Vlans\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;What we gonna able to do is, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ereplace these two connections with a Single Trunk\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Econnection, more on that later though for now, we\nfocused on Vlan’s and, let’s take a look at a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ECisco\nCatalyst 2960 Series Switch, and see how traffic might flow through that Switch,\nif we carved the Ports up into a couple of different Vlan’s\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\n\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;Let’s say, that we have \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Egot PC attached to fastethernet 0\/0\/2 Port of my Cisco\nCatalyst 2960 series Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, and let’s say that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe have got a Server attached to fastetherent 0\/0\/24 Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand we imagine that these devices are in different\nsubnets, we say that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethis PC is part of the\n10.1.1.0\/24 Subnet\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, and \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EServer is\npart of 192.168.1.0\/24 Subnet\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we are in different subnet.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-mu_1uo_HJLA\/WEmMozyAgJI\/AAAAAAAADdA\/dlKLNX72pRYmO7G6IkA5UiqkxieK6lWbACEw\/s1600\/www.ccnaccnplinux.com%2BVlan%2BTheory00010.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/4.bp.blogspot.com\/-mu_1uo_HJLA\/WEmMozyAgJI\/AAAAAAAADdA\/dlKLNX72pRYmO7G6IkA5UiqkxieK6lWbACEw\/s640\/www.ccnaccnplinux.com%2BVlan%2BTheory00010.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; We have to \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ERoute to get between Subnets\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E No Problem, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe can attach a Router to this Layer2 Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nkeeping in mind that some of our \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ECisco Catalyst\nSwitches are Multilayer or Layer 3 Switches they can do Routing internally,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\nbut here we imagine that we got this Router attached.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-WcBVD3gdztA\/WEmM-hpkzWI\/AAAAAAAADdI\/B_fAXoTwMFIuZPbiaXqXqstjJp6rMjI3wCLcB\/s1600\/www.ccnaccnplinux.com%2BVlan%2BTheory00011.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/2.bp.blogspot.com\/-WcBVD3gdztA\/WEmM-hpkzWI\/AAAAAAAADdI\/B_fAXoTwMFIuZPbiaXqXqstjJp6rMjI3wCLcB\/s640\/www.ccnaccnplinux.com%2BVlan%2BTheory00011.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;And this Router can go into \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethe Switch\nwith a single Trunk Connection\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, another words, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Etraffic from Multiple Vlan’s can flow over that single\nconnection, this is often time called a “Router on a Stick” or “Router on a\nTrunk connection”,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E and it’s \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Egoing\nto allows to Route between Ports that belong to different Vlan’s on the Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nlet’s say that these (0\/0\/1-0\/0\/12) Layer 2 Ports are part of Vlan 100, and\nthese (0\/0\/13 – 0\/0\/24) Ports are part of Vlan 200.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-IPuZ_w1M_Ts\/WEmNEAV76uI\/AAAAAAAADdM\/Dr38P9J3QFk4L7l0hM3ruNxi1Ig007FMQCLcB\/s1600\/www.ccnaccnplinux.com%2BVlan%2BTheory00012.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/4.bp.blogspot.com\/-IPuZ_w1M_Ts\/WEmNEAV76uI\/AAAAAAAADdM\/Dr38P9J3QFk4L7l0hM3ruNxi1Ig007FMQCLcB\/s640\/www.ccnaccnplinux.com%2BVlan%2BTheory00012.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u003Cbr \/\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EAnd let’s remember why we\nmight want to have Vlan Separation\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpFirst\" style=\"margin-left: 38.8pt; mso-add-space: auto; mso-list: l1 level1 lfo2; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp;\n\u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EIt can help us with performance to breakout Broadcast domains\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoListParagraphCxSpLast\" style=\"margin-left: 38.8pt; mso-add-space: auto; mso-list: l1 level1 lfo2; text-indent: -.25in;\"\u003E\n\u003C!--[if !supportLists]--\u003E\u003Cspan style=\"font-family: Wingdings; font-size: 12.0pt; line-height: 107%; mso-bidi-font-family: Wingdings; mso-bidi-font-style: italic; mso-bidi-font-weight: bold; mso-fareast-font-family: Wingdings;\"\u003EØ\u003Cspan style=\"font-family: \u0026quot;Times New Roman\u0026quot;; font-size: 7pt; font-stretch: normal; font-variant-numeric: normal; line-height: normal;\"\u003E\u0026nbsp;\n\u003C\/span\u003E\u003C\/span\u003E\u003C!--[endif]--\u003E\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EIt can help us to with Security, that way we don’t have a somebody on our\n\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EVlan doing a packet capture of Unknown unicasts,\nmulticasts and Broadcast on our subnet,\u003C\/span\u003E\u003C\/u\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ethere\nare not able to see in capture these packets because they belong to different\nVlan and the different Broadcast Domain.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;Those are couple of design reason of \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EPerformance and Security that we might want to break thinks\nup into a different Vlans \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Ebut let’s ask the question, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ehow does the PC talk to the Server they are in different Subnets\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nhere the way packet flow goes.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;This \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EPC is gonna\nsend a packet out destined for Server and it’s going to go into the ingress\nSwitchport\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, it’s gonna flow across the switches Fabric another word,\nacross the Switch backplane over to this Trunk port.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-Rjfwq2MZgug\/WEmNNoezzvI\/AAAAAAAADdQ\/N9V1GGGzLmYFOCdt6ALo_0n6w8b9a8wkwCLcB\/s1600\/www.ccnaccnplinux.com%2BVlan%2BTheory00013.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-Rjfwq2MZgug\/WEmNNoezzvI\/AAAAAAAADdQ\/N9V1GGGzLmYFOCdt6ALo_0n6w8b9a8wkwCLcB\/s640\/www.ccnaccnplinux.com%2BVlan%2BTheory00013.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EIt’s gonna flow down to the\nTrunk to the Router.\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-2RGea75p0RE\/WEmNTPJgGWI\/AAAAAAAADdU\/UhKivji0bd89tMwd6--owPs5ioyzjJxyACLcB\/s1600\/www.ccnaccnplinux.com%2BVlan%2BTheory00014.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-2RGea75p0RE\/WEmNTPJgGWI\/AAAAAAAADdU\/UhKivji0bd89tMwd6--owPs5ioyzjJxyACLcB\/s640\/www.ccnaccnplinux.com%2BVlan%2BTheory00014.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; The Router gonna realize\nthat this, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EPacket needs to gonna go to Vlan 200 and\nit’s gonna send a back up to Trunk, for its once again, going to flow over the\nSwitch backplane and go to the egress Ports\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, this time and \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe gonna go out to the Server\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-D0JWxsam-Fc\/WEmNaFpP_tI\/AAAAAAAADdY\/gDegzz8BNAU9O7PzTj0eMq4YlrxsM9cEACLcB\/s1600\/www.ccnaccnplinux.com%2BVlan%2BTheory00015.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-D0JWxsam-Fc\/WEmNaFpP_tI\/AAAAAAAADdY\/gDegzz8BNAU9O7PzTj0eMq4YlrxsM9cEACLcB\/s640\/www.ccnaccnplinux.com%2BVlan%2BTheory00015.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; That’s the way that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eeven with a Layer 2 Switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we \u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ecan have traffic forwarding between different Vlan;s between different\nSubnets\u003C\/span\u003E\u003C\/u\u003E, and now \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe talked about Vlan\nOperation and Theory on this topic\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, in our next topic, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Elet’s review how e Configure and Verify Vlans.\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u003Cu\u003E\u003Ci\u003E\u003Cspan style=\"color: blue;\"\u003E\u003Cbr \/\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/u\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cspan style=\"color: blue; font-family: Trebuchet MS, sans-serif; font-size: x-large;\"\u003E\u003Cb\u003E\u003Cu\u003E\u003Ci\u003E\u003Ca href=\"https:\/\/drive.google.com\/open?id=0Bxhcn6La3ysgX3dUVlRXVXN1bU0\" target=\"_blank\"\u003EClick Here To Download The PDF File\u003C\/a\u003E\u003C\/i\u003E\u003C\/u\u003E\u003C\/b\u003E\u003C\/span\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"background-color: #faf7f7; color: #444444; font-family: \u0026quot;trebuchet ms\u0026quot;, sans-serif; font-size: 16px; margin: 0px; padding: 0px;\"\u003E\n\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;If You Like the Post. Don’t forget\u0026nbsp;\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"background-color: #faf7f7; color: #444444; font-family: \u0026quot;trebuchet ms\u0026quot;, sans-serif; font-size: 16px; margin: 0px; padding: 0px;\"\u003E\n\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"background-color: #faf7f7; color: #444444; font-family: \u0026quot;trebuchet ms\u0026quot;, sans-serif; font-size: 16px; margin: 0px; padding: 0px;\"\u003E\n\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp;\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003Eto\u0026nbsp;“\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: #0070c0; font-size: 18pt; margin: 0px; padding: 0px;\"\u003ESubscribe\/Share\/Comment\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003E”. Thank You.\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003C\/div\u003E\n"},"link":[{"rel":"replies","type":"application/atom+xml","href":"http:\/\/www.ccnaccnplinux.com\/feeds\/8009314042249589904\/comments\/default","title":"Post Comments"},{"rel":"replies","type":"text/html","href":"http:\/\/www.ccnaccnplinux.com\/2016\/12\/vlan-theory.html#comment-form","title":"1 Comments"},{"rel":"edit","type":"application/atom+xml","href":"http:\/\/www.blogger.com\/feeds\/4366728018987920734\/posts\/default\/8009314042249589904"},{"rel":"self","type":"application/atom+xml","href":"http:\/\/www.blogger.com\/feeds\/4366728018987920734\/posts\/default\/8009314042249589904"},{"rel":"alternate","type":"text/html","href":"http:\/\/www.ccnaccnplinux.com\/2016\/12\/vlan-theory.html","title":"VLAN Theory"}],"author":[{"name":{"$t":"Unknown"},"email":{"$t":"noreply@blogger.com"},"gd$image":{"rel":"http://schemas.google.com/g/2005#thumbnail","width":"16","height":"16","src":"https:\/\/img1.blogblog.com\/img\/b16-rounded.gif"}}],"media$thumbnail":{"xmlns$media":"http://search.yahoo.com/mrss/","url":"https:\/\/3.bp.blogspot.com\/-mo2J_TfdF74\/WEmLvwFIQiI\/AAAAAAAADcg\/Z2Fip1QcPgEi2iUnR8PYkyFpxYqCHj88gCLcB\/s72-c\/www.ccnaccnplinux.com%2BVlan%2BTheory00001.jpg","height":"72","width":"72"},"thr$total":{"$t":"1"}},{"id":{"$t":"tag:blogger.com,1999:blog-4366728018987920734.post-6507821895740334094"},"published":{"$t":"2016-12-05T21:57:00.000+05:30"},"updated":{"$t":"2016-12-06T12:32:07.649+05:30"},"category":[{"scheme":"http://www.blogger.com/atom/ns#","term":"CCNP Switch(300-115 and 642-813)"}],"title":{"type":"text","$t":"Features that Increase STP Stability"},"content":{"type":"html","$t":"\u003Cdiv dir=\"ltr\" style=\"text-align: left;\" trbidi=\"on\"\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cimg src=\"https:\/\/4.bp.blogspot.com\/-DI2P8XqAvKs\/WEWOAUkoFyI\/AAAAAAAADaM\/Lrw31-Pwr7gkeIuSpV_AxPNBDAxhGGgDQCLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00005.jpg\" \/\u003E\u003Cbr \/\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;In our previous topic,\nwe talked about a \u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ecollection of Spanning Tree\nProtocol features that could help to reduce the Convergence Time with a\nSpanning Tree Protocol,\u003C\/span\u003E\u003C\/u\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ewhat here in\nthis topic, we wanna talk about another collection of Spanning Tree features,\nthis time though these features are design to helping increase the stability of\nthe Spanning Tree, and by increasing the stability we talking about things that\nmight help prevent a layer 2 Loop is in example, we got 4 features we wanna\ntalk about in this topic.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EThe first one is BPDUGuard\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; display: inline !important; text-align: center;\"\u003E\n\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-HnfsI-foPrg\/WEWNo3MXKuI\/AAAAAAAADaA\/HBO6BUiVvsQGmJQcekdq8ADDtMBZOvzTwCLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00002.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/1.bp.blogspot.com\/-HnfsI-foPrg\/WEWNo3MXKuI\/AAAAAAAADaA\/HBO6BUiVvsQGmJQcekdq8ADDtMBZOvzTwCLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00002.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"line-height: 107%;\"\u003E\u003Cspan style=\"font-size: 12pt;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; And this is gonna work\ntypically handed hand with Portfast that we talked about in the previous\nsession, we gonna see this can add some \u003C\/span\u003E\u003Ci style=\"font-size: 12pt;\"\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eextra\nLoop Prevention Protection\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red; font-size: 12pt;\"\u003E \u003C\/span\u003E\u003Cspan style=\"font-size: 12pt;\"\u003Eon a\nport that configured for Portfast, if we \u003C\/span\u003Eaccidentally\u003Cspan style=\"font-size: 12pt;\"\u003E\u0026nbsp;plug in a Switch to that\nPort, that might potentially cause a loop. \u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EThen we gonna take a look at\nBPDUFilter\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-LuFPJWDqf8k\/WEWNuVYmOlI\/AAAAAAAADaE\/UliBsasy-zYqI3taEu4io-2ZKWoWyPQjgCLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00003.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/2.bp.blogspot.com\/-LuFPJWDqf8k\/WEWNuVYmOlI\/AAAAAAAADaE\/UliBsasy-zYqI3taEu4io-2ZKWoWyPQjgCLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00003.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;And this is an interesting\none because \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Enormally we think BPDU’s are good\nthink they can help prevent loops but there is a time, we might want to filter\nout and not send those BPDU,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E we will see how to do that.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003ENext, we take a look at Root Guard\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-VrnSTqcm6q8\/WEWN5VovV4I\/AAAAAAAADaI\/9ZMEIWCZWV4jbyU9WEwYAyAoA9bdMJUgQCLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00004.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/4.bp.blogspot.com\/-VrnSTqcm6q8\/WEWN5VovV4I\/AAAAAAAADaI\/9ZMEIWCZWV4jbyU9WEwYAyAoA9bdMJUgQCLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00004.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; Let’s imagine that, we\ngot a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESpanning Tree Topology and you know that\nthis(SwA) is gonna be a primary Root Bridge and this(SwB) is gonna be secondary\nRoot Bridge,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand you \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Edon’t want any other Bridges ever becoming the Root\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nyou don’t want somebody accidently or intentionally \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eintroducing the Switch on the network with a Superior BPDU\nand try to take over the Role of the Root,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ewell what we can do is say “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif there is a switch of a specific ports claiming to be the\nRoot, we not going to believe that switch\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”, and feature that\noften gonna be configured along with Root Guard, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eis\na LoopGuard\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-DI2P8XqAvKs\/WEWOAUkoFyI\/AAAAAAAADaM\/Lrw31-Pwr7gkeIuSpV_AxPNBDAxhGGgDQCLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00005.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/4.bp.blogspot.com\/-DI2P8XqAvKs\/WEWOAUkoFyI\/AAAAAAAADaM\/Lrw31-Pwr7gkeIuSpV_AxPNBDAxhGGgDQCLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00005.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; LoopGuard is another Loop\nprevention mechanism as you might be able to guess by name but it can help us\nout to situation for example where, “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe have a\nUnidirectional Link, that stop receiving BPDU’s from a Designated port on a\nsegment, that must mean it’s OK for us to go active, not necessary maybe we\nhave a Unidirectional link failure\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”, Loop Guard can help us to\nprotect from that.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u003Cu\u003ELet’s get ride into a\ndiscussion of \u003Cspan style=\"color: red;\"\u003Efirst of these features BPDU Guard\u003C\/span\u003E\u003C\/u\u003E\u003Cspan style=\"color: red;\"\u003E. \u003Cu\u003EBPDU Guard can work handed hand with Portfast\u003C\/u\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E, remember with Portfast, we can tell\nan \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EAccess Port that, it should not go through the\nListening and Learning state\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, if the device connected to that\nPort, we were essentially saying “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EMr. Port, i\npromise, i am only going connect End Station\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”, “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ei am not going to connect Switch or anything else that might\ncause a loop\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”, so please don’t make, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ea connect device wait through 15 seconds of Listening and 15\nSeconds Learning\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Elet’s go active\nalmost immediately\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, an addition to doing that, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EPortfast has a Loop prevention mechanism built in\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nif we have a port enabled for Portfast, and \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eits\nsees BPDU coming on that port, it realizes that it’s been lying too\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit looks like somebody attached a switch to this\nport and when Portfast starts to see these BPDU’s, it can start Blocking\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\nhowever, it \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Edoesn’t happen instantly,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\nthere can be a brief time where we do have a loop, and BPDU Guard can help prevent\nthat, temporarily loop that we could have during that time that a Portfast,\nport transitions into Blocking.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EAnd we can enable this globally or we can do a port by port bases\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nif we enable it Globally, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit’s only going to\napply to ports that have Portfast enable\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E\n\u003C\/span\u003Eand we said that, what is gonna do is \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eimmediately\nstart Blocking Traffic,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ewe going\nto \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Especifically go into a “Err-Disabled State” on\nthat port if we receive a BPDU because that Port has been configured for\nPortfast\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-j6Z5WWCrC3U\/WEWOUCupmfI\/AAAAAAAADaQ\/FCJMzLQRRjIO-UMbiMg_R68OIDnHib2VQCLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00006.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/1.bp.blogspot.com\/-j6Z5WWCrC3U\/WEWOUCupmfI\/AAAAAAAADaQ\/FCJMzLQRRjIO-UMbiMg_R68OIDnHib2VQCLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00006.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; We promised, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe are not going to attach anything that should be sending a\nBPDU\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif we see that very first\nBPDU, BPDU Guard is gonna shut that Port down\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, and \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ego into a Err-Disabled State\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; By the way \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ehow do you recover from an Err-Disabled State\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nafter \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eyou correct the issue that was causing a\nproblem\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, and the first place a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eway\nto come out the Err-Disabled State\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eis,\nto simply some people call it, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EBouncing the Port\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nwhat \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ei mean by that is\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we go into\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Einterface Configuration mode\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand we do a “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EShutdown\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”\nfollowed by “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ENo\u003C\/span\u003E\u003C\/u\u003E\u003Cspan style=\"color: red;\"\u003E \u003Cu\u003EShutdown\u003C\/u\u003E\u003C\/span\u003E\u003C\/i\u003E”, we administratively take it down, bring it\nbackup, and of the condition \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ecausing the error is\nno longer there, that’s gonna clear out the Err-disabled State, \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Eif\nyou take a look at the topology on picture\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cimg src=\"https:\/\/1.bp.blogspot.com\/-j6Z5WWCrC3U\/WEWOUCupmfI\/AAAAAAAADaQ\/FCJMzLQRRjIO-UMbiMg_R68OIDnHib2VQCLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00006.jpg\" \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;We got port fastetherent 1\/0\/1, that\nhas Portfast enabled, and if we connect end station.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-EwJE_QYasXI\/WEWOifMkJuI\/AAAAAAAADaU\/xYrc1qkZ31w6gQvRwwHvh1Guo4ly1ObrgCLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00007.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/4.bp.blogspot.com\/-EwJE_QYasXI\/WEWOifMkJuI\/AAAAAAAADaU\/xYrc1qkZ31w6gQvRwwHvh1Guo4ly1ObrgCLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00007.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; To that port great, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethat’s really, we intended for\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Emight have a Laptop with an SSD\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, instead of\nregular spinding Hard Disk Drive, it might boot up very very quickly and it\nmight send out a DHCP Broadcast and if Portfast were not enabled, it might not\nable to obtain an IP Address because that port is not yet active, if it’s sending\nout that DHCP Broadcast, however, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif we\naccidently or somebody intentionally plugs in a Switch to this port that Switch\nSw5 in this case, is gonna be sending BPDU.\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-92Q3TA3ovm8\/WEWOzL2z_eI\/AAAAAAAADaY\/o-1y6vKeMs4EjhJoIMQUz2uadLGzBTMIQCLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00008.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-92Q3TA3ovm8\/WEWOzL2z_eI\/AAAAAAAADaY\/o-1y6vKeMs4EjhJoIMQUz2uadLGzBTMIQCLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00008.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; And which that \u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Efirst BPDU is seen on that port because we now have BPDU\nGuard enabled that port is immediately go into an Err-Disabled State\u003C\/span\u003E\u003C\/u\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-NJDNjx-BMd4\/WEWO5_PyrJI\/AAAAAAAADac\/4aoisi4maYEvmN_3k0YqS2uBbTgxnVntACLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00009.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-NJDNjx-BMd4\/WEWO5_PyrJI\/AAAAAAAADac\/4aoisi4maYEvmN_3k0YqS2uBbTgxnVntACLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00009.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;Now we understand the\ntheory of BPDU Guard, what it trying to accomplish let’s take a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Elook at configuration of BPDU Guard\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-vQitFW0nCgI\/WEWPEwakKhI\/AAAAAAAADag\/uPPSoMRuBrcrKJvMI9XblWTwxS8CFmZoACLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00010.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/2.bp.blogspot.com\/-vQitFW0nCgI\/WEWPEwakKhI\/AAAAAAAADag\/uPPSoMRuBrcrKJvMI9XblWTwxS8CFmZoACLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00010.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; That’s \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ehow to\nenable this on interface bases but we can enable it globally\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we\ncould say in global configuration mode.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-V_a_smfXUb8\/WEWPK2LuU3I\/AAAAAAAADak\/ntts_gErF40L4D_ZMgZ_79wP_sCFLDxIACLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00011.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-V_a_smfXUb8\/WEWPK2LuU3I\/AAAAAAAADak\/ntts_gErF40L4D_ZMgZ_79wP_sCFLDxIACLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00011.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EAnd Verification command, we can issue is\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; display: inline !important; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/--20hnhf-Cbw\/WEWPV09zcyI\/AAAAAAAADao\/pfHSbo4i5qEQhhE-NZipWAYtx6OUJEzXwCLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00012.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/2.bp.blogspot.com\/--20hnhf-Cbw\/WEWPV09zcyI\/AAAAAAAADao\/pfHSbo4i5qEQhhE-NZipWAYtx6OUJEzXwCLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00012.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;Our Next \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESpanning Tree stability feature is BPDUFilter\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nand \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Enormally we like BPDU\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we want\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EBPDU’s to be exchanged between our\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003ESwitches because \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethe\nBPDU’s help us to make a Loop-free Spanning Tree topology\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, what \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EBPDUFilter can do is\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, prevent a port from\nsending BPDU’s and \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe can enable this on a Port\nby Port bases\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eor \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe can enable it globally\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand if we enable it globally, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit’s going to apply to ports that have Portfast enabled\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/---Ohq4iGP4I\/WEWPiQCE2VI\/AAAAAAAADas\/2ffe3mbjKgMo_QlTGSYVezFDyrbavqsTQCLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00013.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/4.bp.blogspot.com\/---Ohq4iGP4I\/WEWPiQCE2VI\/AAAAAAAADas\/2ffe3mbjKgMo_QlTGSYVezFDyrbavqsTQCLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00013.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; But\nthe \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ebig question is when should we use this\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nCisco cautions us, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe should only use BPDUFilter\nwhen necessary, \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Ewell when would something like this be\nnecessary, i have sketched on picture here.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-aaQoxGYubXE\/WEWPpjomT4I\/AAAAAAAADaw\/QW2KFH_yf8sTNnMOy6L8LFzi6OIiAeFGQCLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00014.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-aaQoxGYubXE\/WEWPpjomT4I\/AAAAAAAADaw\/QW2KFH_yf8sTNnMOy6L8LFzi6OIiAeFGQCLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00014.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; A couple of \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Edifferent Autonomous System\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, remember what an\nAutonomous System is, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EAutonomous System is simply\na network under a single administrative control\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, these 2 \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EAutonomous System A and B, they could be your company and\nyour Service Provider \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Eif you have a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ELayer 2 Ethernet connection with your Service Provider\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\nor maybe its within your Company you got 2 different Department that have their\nown IT Staff, they manage their own Switches that configure the own STP\nparameters \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ebut they still need to interconnect\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Well maybe you \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Edon’t want to be exchanging Spanning Tree information between\nthese 2 different Autonomous System\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, even with in the same\ncompany\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E, BPDUFilter can be used to do that,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EBPDUFilter can be used to prevent one Autonomous\nSystem from sending BPDU’s into another Autonomous System\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, and i\nmentioned that we could enable this at the \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EPort\nlevel or Globally\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, the behavior is actually bit different and\nits most dangerous, were in \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Emost danger of\ncreating a loop\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif we enabled this\nat the Port level\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-FnKjHaHMQok\/WEWQHmPoSOI\/AAAAAAAADa4\/ogzAYSi8TIstaq4qD0ThHCHiLBdPHPxfACLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00015.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-FnKjHaHMQok\/WEWQHmPoSOI\/AAAAAAAADa4\/ogzAYSi8TIstaq4qD0ThHCHiLBdPHPxfACLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00015.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: left;\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;We will talk about the\ndistinguish when we get into the configuration in a movement, but let’s visualize\nwhat this might do for us, if we setup the BPDUFilter may be on Switch C in an\nAutonomous System A.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-cqG91xYJhFs\/WEWP5yuH-HI\/AAAAAAAADa0\/-DmHX9VOTZ0_lea48m0P0K_KWT4BJtEWACLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00016.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em; text-align: center;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-cqG91xYJhFs\/WEWP5yuH-HI\/AAAAAAAADa0\/-DmHX9VOTZ0_lea48m0P0K_KWT4BJtEWACLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00016.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; That port on SW C, \u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit’s not going to be able to send out a BPDU, it’s not gonna\nget down to Autonomous System B, because BPDUFilter is going to filter that out,\u003C\/span\u003E\u003C\/u\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebut think about this, what \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif Switch D in Autonomous System B were sending a BPDU into a\nSwitch C\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, with that BPDUFilter \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethat\nwe configured for Switch C, would it ignore that BPDU coming from Switch D\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Well the answer of that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Edepends on how we configure it\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Edo we configure it at Port level or do we configure it\nglobally\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, let’s take a look at configuration and talk about the\ndifferent behaviors that we get from \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EPort by Port\nConfiguration vs Global Configuration\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EFirst here, how we set it up at the\nPort Level\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-iwhoXIJy_SE\/WEWQkUACU5I\/AAAAAAAADa8\/Rl9SXB2vnNIsbUwIn52y95iQketQFOXngCLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00017.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/1.bp.blogspot.com\/-iwhoXIJy_SE\/WEWQkUACU5I\/AAAAAAAADa8\/Rl9SXB2vnNIsbUwIn52y95iQketQFOXngCLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00017.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; Here what that\ndoes, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewhen we set this up the Port level,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eit’s very plain and simple, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe telling that port do not send any BPDU’s and if you\nreceive any BPDU’s ignore them,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand\nthat could be a bit \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Edangerous because we ignoring\nany incoming BPDU’s\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we receiving BPDU indicating that we were \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Econnecting to a Switch and we just ignoring those, we might\nget into Loop Situation\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, it’s safer \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif we enable this globally\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, here how we do\nthat we say.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-UtJpW15UcL0\/WEWQyg3c1fI\/AAAAAAAADbE\/VkvzOWW0-EgSbevZh2h5KfhSm4jb3MnVgCLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00018.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/1.bp.blogspot.com\/-UtJpW15UcL0\/WEWQyg3c1fI\/AAAAAAAADbE\/VkvzOWW0-EgSbevZh2h5KfhSm4jb3MnVgCLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00018.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; And here what happened if\nwe enable it globally, The Switch is bit more curious, the Switch says “ \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif i receives BPDU’s on one of these Portfast ports that have\nbeen globally enabled for BPDUFilter, if one of those ports receives the BPDU\nthat Ports is gonna lose its Portfast status\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, so in this case, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe not ignoring incoming BPDU’s instead incoming BPDU’s their\nviewed as warning\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, look at, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe got\na Switch attached to the this port maybe we shouldn’t be on Portfast mode\nanymore\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, and we \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Egonna transition\nout of Portfast mode\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; Infect, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewhen that port first comes up it’s going to try to seek out\nand see,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ewe have \u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eany attach devices that would be sending us BPDU’s\u003C\/span\u003E\u003C\/u\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand its gonna send “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003E10 BPDU’s\nof its own\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”, and \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif it receives\nany BPDU’s in returned\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ethen it’s\ngoing to say “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ENo! we should not be a Portfast Port,\nand we gonna transition out of the Portfast Mode\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”, to see if we\nhave a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EBPDUFilter enabled or not\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we\ncan give the command.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-ZkqudPaU55U\/WEWQ9P0TPII\/AAAAAAAADbI\/-W71U_zSH4kFRk93Bf4F-budOJEOnFxCACLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00019.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-ZkqudPaU55U\/WEWQ9P0TPII\/AAAAAAAADbI\/-W71U_zSH4kFRk93Bf4F-budOJEOnFxCACLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00019.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; We can see how \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Emany\nBPDU we sent\/received\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, after we enable the BPDUFilter, the\nnumber of \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EBPDU has been sent that should not be incrementing\nanymore because we are not gonna be sending any additional BPDU’s\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"margin-bottom: .0001pt; margin-bottom: 0in;\"\u003E\n\u003Cb\u003E\u003Cspan style=\"color: #0070c0; font-size: 12.0pt; line-height: 107%;\"\u003E###############################################################\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"margin-bottom: .0001pt; margin-bottom: 0in;\"\u003E\n\u003Cb\u003E\u003Cspan style=\"color: #0070c0; font-size: 12.0pt; line-height: 107%;\"\u003E# \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp;\u003C\/span\u003E\u003C\/b\u003E\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003ETake a Break of Tea\/Coffee,\nthen we will go to next feature\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003E \u003C\/span\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"color: #0070c0; font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;#\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"margin-bottom: .0001pt; margin-bottom: 0in;\"\u003E\n\u003Cb\u003E\u003Cspan style=\"color: #0070c0; font-size: 12.0pt; line-height: 107%;\"\u003E###############################################################\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;Our next feature is Root Guard, with \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ERoot Guard we want to prevent somebody from intentionally or\naccidentally adding a Switch to network that might send us a superior BPDU and\nclaim to be the Root, \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Efor example, i got couple of Switches on\nPicture.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; display: inline !important; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-hMjkIhLyjIE\/WEWRDydqSII\/AAAAAAAADbM\/lhmKelv59L0G2eBfouadKPtv94xaJaD0ACLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00020.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-hMjkIhLyjIE\/WEWRDydqSII\/AAAAAAAADbM\/lhmKelv59L0G2eBfouadKPtv94xaJaD0ACLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00020.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; That i don’t mine, if they become\nthe Root, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESw1 that’s gonna be my Primary Root\nBridge and Sw2 is gonna be my secondary Root Bridge\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, however, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ei would not want Sw3 to become the Root\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, and\nwe have enable the \u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ERoot Guard on the bottom ports of\nSw1 and Sw3\u003C\/span\u003E\u003C\/u\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eto say “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif i receive the superior BPDU coming into this port, we are not\ngonna believe\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe gonna go into a\nRoot-inconsistent State, \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Ehere how we set it up, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe gonna configure Ports, that should not connect us to the\nRoot Bridge\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, and \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif we do receive\nus a superior BPDU coming in one of those ports, this ports is gonna start\nBlocking traffic\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E, \u003C\/span\u003ESpecifically \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eits gonna go into a Root-Inconsistent State\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-SF2Olryzl6U\/WEWRK2fbFhI\/AAAAAAAADbQ\/bblukDlFYgcCek8WNCvCsNHA79RklgezACLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00021.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-SF2Olryzl6U\/WEWRK2fbFhI\/AAAAAAAADbQ\/bblukDlFYgcCek8WNCvCsNHA79RklgezACLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00021.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;So, let’s imagine that “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESw3 does send a superior BPDU up to Switch Sw1”\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nwhen it (Sw1) gets that superior BPDU, it says “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ei\nam enable for RootGuard this is a superior BPDU and i am not gonna trust that\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”,\ninstead \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ei am going to transition this port to a\nRoot-inconsistent State.\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/2.bp.blogspot.com\/-FobrvYdRkkI\/WEWRRlpj27I\/AAAAAAAADbU\/61WAI3SZpM0sNOML9x6SSrri49KboE4oQCLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00022.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/2.bp.blogspot.com\/-FobrvYdRkkI\/WEWRRlpj27I\/AAAAAAAADbU\/61WAI3SZpM0sNOML9x6SSrri49KboE4oQCLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00022.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; Until those superior BPDU\nstop, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eand as soon as they stop\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe transition out of the Root Inconsistent State\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe don’t have to administratively do anything to\nrecovered from that like we did with the Err-Disabled State\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, now\n\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Elet’s see how to set this up\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, Root\nGuard is only \u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Egoing to be configured at the Port\nlevel\u003C\/span\u003E\u003C\/u\u003E, you would not want to be Globally enable it, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ebut we going to strategically go into those ports, of a which\nwe would not expect to see the Root Bridge\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, here we gonna go\ninto interface\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-PiZsQrSdUDA\/WEWRZwqQ8pI\/AAAAAAAADbY\/vxY9pUn6gEYoYPch5xcImkC2_RjYkraUACLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00023.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/1.bp.blogspot.com\/-PiZsQrSdUDA\/WEWRZwqQ8pI\/AAAAAAAADbY\/vxY9pUn6gEYoYPch5xcImkC2_RjYkraUACLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00023.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp;\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EWe would do that all of the ports, of which we would not\nexpect to see the Root Bridge, \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Eif we did have a port, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethat was in the Root-Inconsistent State\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, here\nhow we can be determined that we could say\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-o-eABs3JcXs\/WEWRhon3OII\/AAAAAAAADbc\/UBIaaRax2d8Hpfs3zrODsf9_IWSP2bMMQCLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00024.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/1.bp.blogspot.com\/-o-eABs3JcXs\/WEWRhon3OII\/AAAAAAAADbc\/UBIaaRax2d8Hpfs3zrODsf9_IWSP2bMMQCLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00024.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp;\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EThis example,\nits look like interface fastetherent 1\/0\/2 is in the Root-Inconsistent State\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; And our Final feature\nthat, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe wanna to talk about in this topic is Loop\nGuard\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, this is something that we want to \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Econfigure in conjunction with Root Guard,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ewhat’s its gonna do is, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ecause a Non-Designated Port to enter a Loop-Inconsistent State\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\nwhich is \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EBlocking State\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif it’s stop receiving the BPDU\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-hXZfD1T_8YQ\/WEWRpe0i04I\/AAAAAAAADbg\/MemY9MmEesQHU4UmcEhfraoFyGSLY24ewCLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00025.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-hXZfD1T_8YQ\/WEWRpe0i04I\/AAAAAAAADbg\/MemY9MmEesQHU4UmcEhfraoFyGSLY24ewCLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00025.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;Here why we do that, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Enormally on a network segment a Designated Port is gonna be\nsending out BPDU’s and the Non-Designated port receives the BPDU’s,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Enow \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethis Non-Designated\nPort stops receiving the BPDU’s\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, it’s \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eassume that the topology is Loop free\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eand it’s \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Estart to transition\nto the forwarding State if it were Blocking\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp; \u0026nbsp;\u0026nbsp;\u0026nbsp;However,\nmaybe its stopped receiving BPDU’s not because, we have a Loop-free topology,\nmay be have in one example, “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ea Unidirectional link,\nand if we have Unidirectional Link may be, we were not receiving BPDU’s but we\ncan still send them\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”, we could create a one way Loop around this\ntopology however, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewith LoopGuard enabled when the\nNon-designated\u0026nbsp; Ports stops receiving BPDU’s\nit transition into a Loop- Inconsistent state\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewhere it blocks traffic\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, and its gonna remain\nthat state until, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eit receives the BPDU and then\nit automatically transitions to the appropriate state\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E maybe \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EBlocking or maybe Forwarding\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ebased on that BPDU\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E and we \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ecan enable this on a Port by Port bases\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we\nwould probably do that on \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eall ports that did not\nhave a Root Guard enabled if we were using Root Guard \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Eor we can \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eturned this on Globally and if we turned it globally\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nit’s \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Egoing to apply to all Point-to-Point links.\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-36tGukWKb2Y\/WEWRu84cKNI\/AAAAAAAADbk\/OWsimB1uIX8MP0w-w4JNqeN4QVYA6lhXQCLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00026.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/4.bp.blogspot.com\/-36tGukWKb2Y\/WEWRu84cKNI\/AAAAAAAADbk\/OWsimB1uIX8MP0w-w4JNqeN4QVYA6lhXQCLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00026.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; Let’s \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Evisualize how this might help\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eus out. On picture notice, we have a \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Elink between Sw2 and Sw3\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E and the port on \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003ESw3 is currently Blocking\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Ebut we know that \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eevery\nnetwork segment has a Designated Port and that Designated port, in this case is\nSwitch Sw2 fastethernet 1\/0\/2 interface\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E and let’s say that, \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe have a Unidirectional Link Failure\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, we have\nsomething \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Elike we talked about earlier called a\nBackhoe fade\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, here comes \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ebig\nBackhoe Fade into the network and it damaged the Fiber Optic Cable\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-Ict9rVQRITk\/WEWR16cPSNI\/AAAAAAAADbo\/K4GW1Hl2Q5s4xS4gGsDn9Is-vd1FB9plQCLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00027.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/4.bp.blogspot.com\/-Ict9rVQRITk\/WEWR16cPSNI\/AAAAAAAADbo\/K4GW1Hl2Q5s4xS4gGsDn9Is-vd1FB9plQCLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00027.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp;\u003C\/span\u003E\u003C\/b\u003E\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ei am no longer\nable to receive traffic from Sw2\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E but \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ewe can send traffic \u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003Eand \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ethat can cause a Loop\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Eif we did not have a Loop Guard enabled\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E, but\nwe do Switch Sw3 says “\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ei am no longer receiving\nBPDU’s on this link, so i am going to enter Loop-Inconsistent State\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E”.\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/4.bp.blogspot.com\/-reIcmCv8BB0\/WEWR7nawSPI\/AAAAAAAADbs\/olSwa28rtFEBRrRxXKMBX3FoMPCadkylgCLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00028.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/4.bp.blogspot.com\/-reIcmCv8BB0\/WEWR7nawSPI\/AAAAAAAADbs\/olSwa28rtFEBRrRxXKMBX3FoMPCadkylgCLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00028.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003ELet’s see how to set this up, first\nwe can go into Interface Configuration Mode\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-g_ZA2hZ3Cn8\/WEWSGHBRfJI\/AAAAAAAADbw\/Pvas81Y5qeUw_hnoYYsj6p-PyXCZu2HxQCLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00029.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-g_ZA2hZ3Cn8\/WEWSGHBRfJI\/AAAAAAAADbw\/Pvas81Y5qeUw_hnoYYsj6p-PyXCZu2HxQCLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00029.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"text-align: left;\"\u003E\n\u003Cb\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u0026nbsp;\u003Ci\u003E\u003Cu\u003EThat will\nenable it Port by Port, and to enable it Globally we would say\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/3.bp.blogspot.com\/-v3JvIsxZ550\/WEWSKQrpeRI\/AAAAAAAADb0\/7lX5dpGNRjALoveg2YcM7VwsKvN97-_mQCLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00030.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/3.bp.blogspot.com\/-v3JvIsxZ550\/WEWSKQrpeRI\/AAAAAAAADb0\/7lX5dpGNRjALoveg2YcM7VwsKvN97-_mQCLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00030.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red; font-size: 12.0pt; line-height: 107%;\"\u003EAnd to see its enabled or\nnot, we can give Verification Command\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"separator\" style=\"clear: both; text-align: center;\"\u003E\n\u003Ca href=\"https:\/\/1.bp.blogspot.com\/-JR8m6iMMDJo\/WEWSQapPFpI\/AAAAAAAADb4\/aqoLa0CuI6k66e0-gARfqQHQNoVTebuMgCLcB\/s1600\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00031.jpg\" imageanchor=\"1\" style=\"margin-left: 1em; margin-right: 1em;\"\u003E\u003Cimg border=\"0\" height=\"368\" src=\"https:\/\/1.bp.blogspot.com\/-JR8m6iMMDJo\/WEWSQapPFpI\/AAAAAAAADb4\/aqoLa0CuI6k66e0-gARfqQHQNoVTebuMgCLcB\/s640\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00031.jpg\" width=\"640\" \/\u003E\u003C\/a\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"text-align: left;\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u003Cbr \/\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"text-align: left;\"\u003E\n\u003Cb\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EAnd you can see the second line of output of bottom it says\nLoopGuard default,\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003Cspan style=\"color: red;\"\u003E \u003C\/span\u003Eit is enabled that\nonly \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003Ecan force Spanning Tree Protocol feature\nthat can help us increase the stability of our Spanning tree topology\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E,\nwe talked about \u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"color: red;\"\u003EBPDUGuard, BPDUFilter, RootGuard\nand the LoopGuard.\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cb\u003E\u003Ci\u003E\u003Cu\u003E\u003Cspan style=\"font-size: 12.0pt; line-height: 107%;\"\u003EThat’s\nthe last session of this Spanning Tree Module, \u003Cspan style=\"color: red;\"\u003Enow in\nour upcoming module we will discuss about VLAN’s\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/u\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"text-align: center;\"\u003E\n\u003Cspan style=\"color: blue; font-family: \u0026quot;trebuchet ms\u0026quot; , sans-serif; font-size: x-large;\"\u003E\u003Ci\u003E\u003Cb\u003E\u003Cu\u003E\u003Ca href=\"https:\/\/drive.google.com\/file\/d\/0Bxhcn6La3ysgUFBVd2FhaDBmZ0U\/view?usp=sharing\" target=\"_blank\"\u003EClick Here To Download the PDF File\u003C\/a\u003E\u003C\/u\u003E\u003C\/b\u003E\u003C\/i\u003E\u003C\/span\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"background-color: #faf7f7; color: #444444; font-family: \u0026quot;trebuchet ms\u0026quot;, sans-serif; font-size: 16px; margin: 0px; padding: 0px;\"\u003E\n\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;If You Like the Post. Don’t forget\u0026nbsp;\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"background-color: #faf7f7; color: #444444; font-family: \u0026quot;trebuchet ms\u0026quot;, sans-serif; font-size: 16px; margin: 0px; padding: 0px;\"\u003E\n\u003Co:p\u003E\u003C\/o:p\u003E\u003C\/div\u003E\n\u003Cdiv class=\"MsoNormal\" style=\"background-color: #faf7f7; color: #444444; font-family: \u0026quot;trebuchet ms\u0026quot;, sans-serif; font-size: 16px; margin: 0px; padding: 0px;\"\u003E\n\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003E\u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp; \u0026nbsp;\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003Eto\u0026nbsp;“\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: #0070c0; font-size: 18pt; margin: 0px; padding: 0px;\"\u003ESubscribe\/Share\/Comment\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003Cb style=\"text-align: center;\"\u003E\u003Ci\u003E\u003Cspan style=\"color: red; font-size: 18pt; margin: 0px; padding: 0px;\"\u003E”. Thank You.\u003C\/span\u003E\u003C\/i\u003E\u003C\/b\u003E\u003C\/div\u003E\n\u003Cdiv align=\"center\" class=\"MsoNormal\" style=\"background: #FAF7F7; line-height: normal; margin-bottom: .0001pt; margin-bottom: 0in; text-align: center;\"\u003E\n\u003Cbr \/\u003E\u003C\/div\u003E\n\u003C\/div\u003E\n"},"link":[{"rel":"replies","type":"application/atom+xml","href":"http:\/\/www.ccnaccnplinux.com\/feeds\/6507821895740334094\/comments\/default","title":"Post Comments"},{"rel":"replies","type":"text/html","href":"http:\/\/www.ccnaccnplinux.com\/2016\/12\/features-that-increase-stp-stability.html#comment-form","title":"0 Comments"},{"rel":"edit","type":"application/atom+xml","href":"http:\/\/www.blogger.com\/feeds\/4366728018987920734\/posts\/default\/6507821895740334094"},{"rel":"self","type":"application/atom+xml","href":"http:\/\/www.blogger.com\/feeds\/4366728018987920734\/posts\/default\/6507821895740334094"},{"rel":"alternate","type":"text/html","href":"http:\/\/www.ccnaccnplinux.com\/2016\/12\/features-that-increase-stp-stability.html","title":"Features that Increase STP Stability"}],"author":[{"name":{"$t":"Unknown"},"email":{"$t":"noreply@blogger.com"},"gd$image":{"rel":"http://schemas.google.com/g/2005#thumbnail","width":"16","height":"16","src":"https:\/\/img1.blogblog.com\/img\/b16-rounded.gif"}}],"media$thumbnail":{"xmlns$media":"http://search.yahoo.com/mrss/","url":"https:\/\/4.bp.blogspot.com\/-DI2P8XqAvKs\/WEWOAUkoFyI\/AAAAAAAADaM\/Lrw31-Pwr7gkeIuSpV_AxPNBDAxhGGgDQCLcB\/s72-c\/www.ccnaccnplinux.com%2BFeatures%2Bthat%2BIncrease%2BSTP%2BStability00005.jpg","height":"72","width":"72"},"thr$total":{"$t":"0"}}]}});