Alcatel-Lucent 6850-48 Reference Guide
BGP Commands
OmniSwitch CLI Reference Guide
September 2009
page 44-27
ip bgp dampening
Enables or disables BGP route dampening or the suppression of unstable routes. Route dampening helps to
control the advertisement of routes that are going up and then down at an abnormally high rate. Routes
that are changing states (available then unavailable) are said to be flapping.
control the advertisement of routes that are going up and then down at an abnormally high rate. Routes
that are changing states (available then unavailable) are said to be flapping.
ip bgp dampening [half-life half_life reuse reuse suppress suppress max-suppress-time
max_suppress_time]
max_suppress_time]
no ip bgp dampening
Syntax Definitions
half_life
The half-life duration, in seconds. The valid range is 0–65535.
reuse
The number of route withdrawals set for the re-use value. The valid
range is 1–9999.
range is 1–9999.
suppress
The dampening cutoff value. The valid range is 1–9999.
max_suppress_time
The maximum number of seconds a route can be suppressed. The valid
range is 0–65535.
range is 0–65535.
Defaults
This command is disabled by default.
Platforms Supported
OmniSwitch 6850, 6855, 9000, 9000E
Usage Guidelines
• Use the no form of this command to disable dampening.
• BGP dampening is disabled by default. When enabled, route dampening suppresses routes that are
unstable, or “flapping,” and disrupting the network.
• BGP dampening of IPv6 route flaps is currently not supported.
• This command enables dampening and can also be used to change the default times for the dampening
variables.
• Use the dampening variables to set penalties, suppression limits, and reuse values for flapping routes.
parameter
value
half_life
300
reuse
200
suppress
300
max_suppress_time
1800