White Papers

Command Modes ROUTER BGP
Supported Modes Full–Switch
Command
History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
Usage
Information
The Autonomous Systems configured in this command are visible to the EBGP neighbors. Each
Autonomous System is fully meshed and contains a few connections to other Autonomous Systems.
After specifying autonomous systems numbers for the BGP confederation, recycle the peers to update
their configuration.
Related
Commands
bgp confederation identifier — configures a confederation ID.
bgp dampening
Enable BGP route dampening and configure the dampening parameters.
Syntax
bgp dampening [half-life reuse suppress max-suppress-time] [route-map map-
name]
Parameters
half-life (OPTIONAL) Enter the number of minutes after which the Penalty is decreased.
After the router assigns a Penalty of 1024 to a route, the Penalty is decreased by
half, after the half-life period expires. The range is from 1 to 45. The default is 15
minutes.
reuse (OPTIONAL) Enter a number as the reuse value, which is compared to the flapping
route’s Penalty value. If the Penalty value is less than the reuse value, the flapping
route is once again advertised (or no longer suppressed). The range is from 1 to
20000. The default is 750.
suppress (OPTIONAL) Enter a number as the suppress value, which is compared to the
flapping route’s Penalty value. If the Penalty value is greater than the suppress
value, the flapping route is no longer advertised (that is, it is suppressed). The
range is from 1 to 20000. The default is 2000.
max-suppress-
time
(OPTIONAL) Enter the maximum number of minutes a route can be suppressed.
The default is four times the half-life value. The range is from 1 to 255. The default
is 60 minutes.
route-map map-
name
(OPTIONAL) Enter the keywords route-map then the name of a configured route
map. Only match commands in the configured route map are supported.
Defaults Disabled.
Command Modes ROUTER BGPV6-ADDRESS FAMILY
Supported Modes Full–Switch
Command
History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
Usage
Information
If you enter bgp dampening, the default values for half-life, reuse, suppress, and max-
suppress-time are applied. The parameters are position-dependent; therefore, if you configure one
parameter, you must configure the parameters in the order they appear in the command.
Related
Commands
show ip bgp ipv6 unicast dampened-paths — views the BGP paths.
608 IPv6 Border Gateway Protocol (IPv6 BGP)