Lab 132 - BGP Dampening

Prerequisites: CCNP level skills.

Topology

Pic. 1 - Topology Diagram.

Icons designed by: Andrzej Szoblik - http://www.newo.pl

Task 1
Configure R3 to use BGP dampening according to the following:

• Penalty should be reduced by half after 10 minutes (default=15).
• The dampened route must be reused when it reaches value of 700. (default=750).
• Route should not be used when it reaches 2000 points (default=2000).
• The routes that experience flaps should not be suppressed for more than 40. minutes (default=4 x half-time).

Solution

Task 1

Configure R3 to use BGP dampening according to the following:

• Penalty should be reduced by half after 10 minutes (default=15).
• The dampened route must be reused when it reaches value of 700. (default=750).
• Route should not be used when it reaches 2000 points (default=2000).
• The routes that experience flaps should not be suppressed for more than 40. minutes (default=4 x half-time).

R3 Configuration:

!

router bgp 123
 no synchronization
 bgp router-id 172.16.103.3
 bgp log-neighbor-changes
 bgp dampening 10 700 2000 40
 network 172.16.103.0 mask 255.255.255.0
 neighbor 10.1.13.1 remote-as 123
 neighbor 10.1.13.1 route-reflector-client
 neighbor 10.1.13.1 next-hop-self
 neighbor 10.1.23.2 remote-as 123
 neighbor 10.1.23.2 route-reflector-client
 neighbor 10.1.23.2 next-hop-self
 neighbor 10.1.35.5 remote-as 50
 no auto-summary

!

Verification:

Pic. 2 - BGP Dampening Parameters.