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Cisco IOS in a Nutshell, 2nd Edition by James Boney

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Name

bgp dampening — global

Synopsis

bgp dampening [half-life reuse suppress max-suppress-time] [route-map map]
no bgp dampening [half-life reuse suppress max-suppress-time] [route-map map]

Configures

BGP dampening settings

Defaults

half-life, 15 min; reuse, 750; suppress, 2000; max-suppress-time, 60 min

Description

This command allows you to specify the route dampening values for BGP. Dampening allows you to control “route flap,” which is routing instability that results from a route making repeated transitions.

half-life

The time in minutes after which a penalty is decreased by half.

reuse

If the penalty for a flapping route increases to this value, the route can be reused.

suppress

When the penalty exceeds this limit, the route is suppressed.

max-suppress-time

The maximum amount of time a route can be suppressed; this should be about four times the half-life.

route-map map

A route map that controls which routes are selected for route dampening.

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