Version 7.2 649 Mediant MSBR
Reference Guide 75. Layer-3 Commands
75.2.2.22 bgp dampening
This command enables route-flap dampening. Flapping routes trigger instability in the routing
table. Routers running BGP have a mechanism designed to reduce the destabilizing effect of
flapping routes.
Syntax
bgp dampening
bgp dampening <half life time>
bgp dampening [<half life time>] <re-use limit> [<start suppress>
<suppress duration>
Command Description
half life time
Defines the amount of time that must pass to decrease the
penalty by one half [1-45].
re-use limit Defines the value to start reusing a route [1 – 20000].
This value is compared to the penalty value to resolve route
reusability. If the penalty is greater than the suppress limit, the
route is suppressed. Otherwise, it is reused.
start suppress
Defines the value that specifies the penalty that will be used if
a route is suppressed [1 – 20000].
suppress duration Defines the maximum duration in minutes that a route will be
suppressed [1-255].
Default
NA
Command Mode
Privileged User
Example
The following is an example of how this command is used.
# configure data
(config-data)# router bgp 2
(conf-router)# bgp dampening 1 1000 1000 100
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