August 2005
Intermediate to advanced
798 pages
31h 12m
English
bgp dampening — global
bgp dampening [half-life reuse suppress max-suppress-time] [route-mapmap] no bgp dampening [half-life reuse suppress max-suppress-time] [route-mapmap]
BGP dampening settings
half-life, 15 min; reuse, 750; suppress, 2000; max-suppress-time, 60 min
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.