dampening

Sets dampening parameters for the route in BGP address-family mode.

Syntax

dampening { half-life reuse suppress max-suppress-time | route-map route-map }

no dampening

Command Default

Disabled.

Parameters

half-life

Number of minutes after which the route penalty becomes half its value. Range is from 1 through 45. Default is 15.

reuse

Minimum penalty below which the route becomes usable again. Range is from 1 through 20000. Default is 750.

suppress

Maximum penalty above which the route is suppressed by the device. Range is from 1 through 20000. Default is 2000.

max-suppress-time

Maximum number of minutes a route can be suppressed by the device. Range is from 1 through 255. Default is 40.

route-map

Enables selection of dampening values established in a route map by means of the route-map command.

route-map: Name of the configured route map.

Modes

BGP address-family IPv4 unicast configuration mode

BGP address-family IPv6 unicast configuration mode

Usage Guidelines

Use the no form of this command to disable dampening.

Use dampening without operands to set default values for all dampening parameters.

To use the dampening values established in a route map, configure the route map first, and then enter the route-map command, followed by the name of the configured route map.

A full range of dampening values (half-life, reuse, suppress, max-suppress-time) can also be set by means of the set as-path prepend command.

Examples

The following example enables default dampening as an IPv4 address-family function.

device# configure terminal
device(config)# router bgp
device(config-bgp-router)# address-family ipv4 unicast
device(config-bgp-ipv4u)# dampening

The following example changes all the dampening values as an IPv6 address-family function.

device# configure terminal
device(config)# router bgp
device(config-bgp-router)# address-family ipv6 unicast
device(config-bgp-ipv6u)# dampening 20 200 2500 40