Command Reference Guide

34 ● dampening 3Com Router 5000 Family and Router 6000 Family
Command Reference
dampening
Purpose Use the dampening command to make BGP route dampening valid or modify
various BGP route dampening parameters.
Use the undo dampening command to make the characteristics invalid.
Syntax dampening [ half-life-reachable half-life-unreachable reuse suppress
ceiling ] [ route-policy policy-name ]
undo dampening
Parameters half-life-reachable
Specifies the half-life when the route is reachable. The
range is 1 to 45 minutes. By default, the value is 15
minutes.
half-life-unreachable
Specifies the half-life when the route is unreachable.
The range is 1 to 45 minutes. By default, the value is
15 minutes.
reuse
Penalty value of a route when it starts to be reused.
The range is 1 to 20000. By default, its value is 750.
suppress
Penalty threshold of a route when it starts to be
suppressed. The range is 1 to 20000. By default, its
value is 2000.
ceiling
Upper threshold of the penalty. The range is 1001 to
20000. By default, its value is 16000.
policy-name
Route policy name.
Default By default, no route dampening is configured.
Example Modify BGP route dampening parameters.
[3Com -bgp] dampening 15 15 1000 2000 10000
View This command can be used in the following views:
■ BGP view
Description If these parameters are not set, their default values are used.
half-life-reachable
, half-life-unreachable, reuse, suppress
and
ceiling are mutually dependent. Once any one is configured, all others should
also be specified accordingly.
The dampening command dampens only the routes that are learned from EBGP
peers; it dampens no IBGP routes.