Tuesday, March 24, 2015

2 comments

Policy-Based Routing IP-SLA (Part-2 CCNP)




Ø  SLA Stands for Service Level Agreement
Ø  Allow us to understand the health of  the network along with particular route
Ø  Also allow us to automatically forwards the traffic if one ISP is down to other ISP if we have redundant ISP Connections
Ø  In this scenario we have two ISP Connection coming to our Enterprise Network

1st Step: - IP-SLA Configuration:-
Ø  Ping 200.200.200.1                            {ISP1}
Ø  Ping 200.200.200.5                {ISP2}     {Check the connectivity}

Ø  R1(config)#ip sla 1                                                         {1:- SLA entry Number}
Ø  R1(config-ip-sla)#icmp-echo 200.200.200.1           {ISP1 ip address}
Ø  R1(config-ip-sla-echo)#timeout 200                      {milliseconds}
Ø  R1(config-ip-sla-echo)#frequency 1                       {Second}
Ø  R1(config-ip-sla-echo)#threshold 300                   {milliseconds}
Ø  R1(config-ip-sla-echo)#exit
ü  200.200.00.1:- What is IP address we wana ping
ü  icmp-echo: - Using Ping
ü  Timeout:-how long we wana wait for Ping response back {or consider ping lost}
ü  Frequency:-how many seconds we sending the ping
ü  Threshold:-how long until we consider that device down
2nd Step:- Now Start the SLA
Ø  R1(config)#ip sla schedule 1 start-time now life forever
ü  1:-SLA entry number
3rd Step: - To Make Routing Decision Respond to the SLA {entry or probe}
Ø  R1(config)#track 1 rtr 1
Ø  R1(config-track)#exit
ü  1:-Track Object number
ü  rtr:- Response Time Reporter (RTR) Previous name of IP-SLA
ü  1:- entry number

Track object take the SLA entry and essentially says the ip address/interface is up or down
4th Step:- Now attach the Track object to our Static routes
Ø  R1(config)#ip route 0.0.0.0 0.0.0.0 200.200.200.1 track 1     
ü  Primary Routes from ISP1
ü  Track 1:- Track object number

Ø  R1(config)#ip route 0.0.0.0 0.0.0.0 200.200.200.5 10       
ü  10 :- Administrative distance      
ü  Backup Route from ISP2
Troubleshooting & Verification Commands:-
Ø  R1#show ip sla statistics
Ø  R1#show track
Ø  R1#show ip route
Now Test
Ø  Shutdown the ISP1 serial interface
Ø  Automatically all the traffic goes to ISP2
After no shut

Ø  And all traffic goes to ISP

Click Here To Download The PDF File

2 comments:

  1. Great Article
    Cyber Security Projects

    projects for cse

    Networking Security Projects

    JavaScript Training in Chennai

    JavaScript

    Training in Chennai


    The Angular Training covers a wide range of topics including Components, Angular Directives, Angular Services, Pipes, security fundamentals,

    Routing, and Angular programmability. The new Angular TRaining will lay the foundation you need to specialise in Single Page Application developer.

    Angular Training

    ReplyDelete