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DXS-3600 Series 10GbE Layer 2/3 Switch CLI Reference Guide
74
7-16 bgp dampening
This command is used to enable BGP route dampening or to change the BGP route dampening parameters. To disable
BGP dampening, use the no form of this command.
bgp dampening [[HALF-LIFE REUSE SUPPRESS MAX-SUPPRESS-TIME UN-REACHABILTY-HALF-TIME] |
[route-map MAP-NAME]]
no bgp dampening [route-map]
Parameters
Usage Guideline
The command is used to configure multiple adjacent Autonomous Systems in a
confederation. The Autonomous Systems, specified in this command, are visible
internally to the confederation. Each Autonomous System is fully meshed within itself
or configures a route reflector.
Use the no bgp confederation peers command to delete all the or part of the AS
numbers, configured earlier.
Use the show ip bgp confederation command to verify your settings.
Example
In the following example, Autonomous Systems 21, 22, 23, 24, and 25 are
configured to belong to a single confederation using the identifier 10.
DXS-3600-32S#configure terminal
DXS-3600-32S(config)#router bgp 100
DXS-3600-32S(config-router)#bgp confederation identifier 10
DXS-3600-32S(config-router)#bgp confederation peers 21,22,23,24,25
DXS-3600-32S(config-router)#
Example
This example shows how to delete part of the AS numbers, configured earlier.
DXS-3600-32S#configure terminal
DXS-3600-32S(config)#router bgp 100
DXS-3600-32S(config-router)#no bgp confederation peers 21,22
DXS-3600-32S(config-router)#
HALF-LIFE Specifies the time, in minutes, after which the penalty of the reachable routes will be
down, by half.
REUSE If the penalty for a flapping route decreases enough to fall below this value, the route
is unsuppressed.
SUPPRESS A route is suppressed when its penalty exceeds this limit.
MAX-SUPPRESS-TIME Specifies the maximum time, in minutes, that a route can be suppressed.
UN-REACHABILITY-HALF-
LIFE
Specifies the time, in minutes, after which the penalty of the unreachable route will
be down, by half.
MAP-NAME Specifies the route map name for configuring the dampening running configuration.
The maximum length is 16 characters.
Default
BGP dampening is disabled by default. The following values are used when this
command is enabled, without configuring any optional arguments:
Half-life:15 minutes.
Reuse: 750.
Suppress: 2000.
Max-suppress-time: 60 minutes.
Un-reachability-half-life: 15 minutes.
Command Mode
Router Configuration Mode.
Command Default Level
Level: 8. (EI Mode Only Command)
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