BGP Commands
ExtremeWare XOS 11.5 supports only the Summit X450 family of switches and the BlackDiamond 8800 series switch.
ExtremeWare XOS 11.5 Command Reference Guide
1708
configure bgp peer-group dampening
configure bgp peer-group <peer-group-name> {address-family [ipv4-unicast |
ipv4-multicast]} dampening {{half-life <half-life-minutes> {reuse-limit
<reuse-limit-number> supress-limit <suppress-limit-number> max-suppress
<max-suppress-minutes>}} | policy-filter [<policy-name> | none]}
Description
Configures route flap dampening for a BGP peer group.
Syntax Description
Default
This feature is disabled by default.
If no address family is specified, IPv4 unicast is the default.
Usage Guidelines
The half life is the period of time, in minutes, during which the accumulated penalty of a route is
reduced by half. The range is 1 to 45 minutes, and the default is 15 minutes.
The reuse limit is the penalty value below which a route will be used again. The range is 1-20,000, and
the default is 750.
The suppress limit is the penalty value above which a route will be suppressed. The range is 1-20,000,
and the default is 2,000.
The maximum hold down time is the maximum time a route can be suppressed, no matter how
unstable it has been, as long as it no longer flaps. The range is 1-255 minutes, and the default is 4 * the
half life.
Instead of explicitly configuring the dampening parameters using the command line, you can associate
a policy using the
policy-filter
option. Multiple sets of parameters can be supplied using a policy.
peer-group-name
Specifies a peer group
address-family
The address family. BGP supports two address families: IPv4 Unicast and IPv4
Multicast
half-life-minutes
Specifies the dampening half life.
reuse-limit-number
Specifies the reuse limit.
suppress-limit-number
Specifies the suppress limit.
max-suppress-minutes
Specifies the maximum hold down time.
policy-name
Specifies a policy
none
Removes any policy association.
