Reference Guide

232 | Border Gateway Protocol IPv4 (BGPv4)
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Use the following command in the CONFIGURATION ROUTER BGP mode to configure route flap
dampening parameters.
To view the BGP configuration, use
show config in the CONFIGURATION ROUTER BGP mode or
show running-config bgp in EXEC Privilege mode.
To set dampening parameters via a route map, use the following command in CONFIGURATION
ROUTE-MAP mode:
Command Syntax Command Mode Purpose
bgp dampening [half-life |
reuse | suppress
max-suppress-time]
[route-map map-name]
CONFIG-ROUTER-B
GP
Enable route dampening.
Enter the following optional parameters to configure route
dampening parameters:
•
half-life range: 1 to 45. Number of minutes after which the
Penalty is decreased. After the router assigns a Penalty of
1024 to a route, the Penalty is decreased by half after the
half-life period expires. (Default: 15 minutes)
• reuse range: 1 to 20000. This number is compared to the
flapping route’s Penalty value. If the Penalty value is less
than the reuse value, the flapping route is once again
advertised (or no longer suppressed). Withdrawn routes are
removed from history state. (Default: 750)
•
suppress range: 1 to 20000. This number is compared to the
flapping route’s Penalty value. If the Penalty value is greater
than the suppress value, the flapping route is no longer
advertised (that is, it is suppressed). (Default: 2000.)
•
max-suppress-time range: 1 to 255. The maximum number
of minutes a route can be suppressed. The default is four
times the half-life value. (Default: 60 minutes.)
• route-map map-name: name of a configured route map.
Only match commands in the configured route map are
supported. Use this parameter to apply route dampening to
selective routes.