Friday, March 20, 2015

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Basic BGP Configuration (BGP Part-2 CCNP)

BGP Basic Configuration

  v  R2 interfaces Configuration:-
Ø  interface FastEthernet0/0
Ø   description CONNECTED WITH SW1
Ø   ip address 192.192.12.2 255.255.255.0
Ø   no shut
Ø   exit

  v  R1 interfaces Configuration:-
Ø   interface FastEthernet0/0
Ø   description CONNECTED WITH SW1
Ø   ip address 192.192.12.1 255.255.255.0
Ø   no shut
Ø   exit

Ø  interface Serial0/0
Ø   description CONNECTED WITH R1
Ø   ip address 192.192.1.2 255.255.255.252
Ø   clock rate 2000000
Ø   no shut
Ø   exit

Ø  interface Serial0/1
Ø   description CONNECTED WITH RELIANCE_ISP
Ø   ip address 192.192.1.6 255.255.255.252
Ø   clock rate 2000000
Ø   no shut
Ø   exit

  v  Airtel_ISP Interfaces Configuration:-
Ø  interface Serial0/0
Ø   description CONNECTED WITH R1
Ø   ip address 192.192.1.1 255.255.255.252
Ø   clock rate 64000
Ø   no shut
Ø   exit

Ø  interface Serial0/1
Ø   description CONNECTED WITH VODAFONE_ISP
Ø   ip address 200.200.1.5 255.255.255.252
Ø   clock rate 2000000
Ø   no shut
Ø   exit

  v  Reliance_ISP interface Configuration:-
Ø   interface Serial0/0
Ø   description CONNECTED WITH VODAFONE_ISP
Ø   ip address 200.200.1.1 255.255.255.252
Ø   clock rate 2000000
Ø   no shut
Ø   exit

Ø  interface Serial0/1
Ø   description CONNECTED WITH R1
Ø   ip address 192.192.1.5 255.255.255.252
Ø   clock rate 2000000
Ø   no shut
Ø   exit

  v  Vodafone_ISP interfaces Configuration:-
Ø  interface Serial0/0
Ø   description CONNECTED WITH RELIANCE_ISP
Ø   ip address 200.200.1.2 255.255.255.252
Ø   clock rate 2000000
Ø   no shut
Ø   exit

Ø  interface Serial0/1
Ø   description CONNECTED WITH AIRTEL_ISP
Ø   ip address 200.200.1.6 255.255.255.252
Ø   clock rate 2000000
Ø   no shut
Ø   exit

Terms:-
Ø  {Remote-as:-Specify a BGP neighbor Autonomous No. {AS No} 
Ø  BGP Synchronization:- Do not use or advertise a route learned via IBGP until the same route has been learned from the internal routing protocol
Ø  BGP next-hop-processing:-
ü  For EBGP peers:- change next hop address on advertised routes
ü  For IBGP peers:-do not change next hop address on advertise routes

  v  R2 BGP Configuration:-
Ø  R1(config)# router bgp 65001
Ø   no synchronization
Ø   bgp router-id 2.2.2.2
Ø   network 192.192.12.0 mask 255.255.255.0
Ø   neighbor 192.192.12.1 remote-as 65001
Ø   neighbor 192.192.12.1 description R1
Ø   no auto-summary

  v  R1 BGP Configuration:-
Ø  R2(config)#router bgp 65001
Ø   no synchronization
Ø   bgp router-id 1.1.1.1
Ø   network 192.192.1.0 mask 255.255.255.252
Ø   network 192.192.1.4 mask 255.255.255.252
Ø   neighbor 192.192.1.1 remote-as 65002                        
Ø   neighbor 192.192.1.1 description AIRTEL_ISP
Ø   neighbor 192.192.1.5 remote-as 65004
Ø   neighbor 192.192.1.5 description RELIANCE_ISP
Ø   neighbor 192.192.12.2 remote-as 65001
Ø   neighbor 192.192.12.2 description R2
Ø   no auto-summary

  v  Airtel_ISP BGP Configuration:-
Ø  Airtel_ISP(config)#router bgp 65002
Ø  no synchronization
Ø   bgp router-id 3.3.3.3
Ø   network 192.192.1.0 mask 255.255.255.252
Ø   network 200.200.1.4 mask 255.255.255.252
Ø   neighbor 192.192.1.2 remote-as 65001
Ø   neighbor 192.192.1.2 description R1
Ø   neighbor 200.200.1.6 remote-as 65003
Ø   neighbor 200.200.1.6 description VODAFONE_ISP
Ø   no auto-summary

  v  Reliance_ISP Configuration:-
Ø  Reliance_ISP (config)#router bgp 65004
Ø  no synchronization
Ø   bgp router-id 4.4.4.4
Ø   network 192.192.1.4 mask 255.255.255.252
Ø   network 200.200.1.0 mask 255.255.255.252
Ø   neighbor 192.192.1.6 remote-as 65001
Ø   neighbor 192.192.1.6 description R1
Ø   neighbor 200.200.1.2 remote-as 65003
Ø   neighbor 200.200.1.2 description VODAFONE_ISP
Ø   no auto-summary



  v  Vodafone_ISP {BGP} Configuration:-
Ø  Vodafone_ISP (config)#router bgp 65003
Ø  no synchronization
Ø   bgp router-id 5.5.5.5
Ø   network 200.200.1.0 mask 255.255.255.252
Ø   network 200.200.1.4 mask 255.255.255.252
Ø   neighbor 200.200.1.1 remote-as 65004
Ø   neighbor 200.200.1.1 description RELIANCE_ISP
Ø   neighbor 200.200.1.5 remote-as 65002
Ø   neighbor 200.200.1.5 description AIRTEL_ISP
Ø   no auto-summary

Troubleshooting & Verification Commands:-
Ø  show ip route
Ø  show ip interface brief
Ø  show ip bgp summary         {Shows BGP neighbor}
Ø  show ip bgp                          {Shows BGP network information}
Ø  show ip bgp neighbor

1 comment:

  1. Great Article
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