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suppress: Specifies a suppression threshold from 1 to 20000. The route with a penalty value higher than the threshold is suppressed. The default value is 2000.

ceiling: Specifies a ceiling penalty value from 1001 to 20000. The value must be bigger than the suppress value. By default, the value is 16000.

route-policy-name: Routing policy name, a string of 1 to 19 characters.

half-life-reachable, half-life-unreachable, reuse, suppress and ceiling are mutually dependent. Once any one is configured, all the others should also be specified accordingly.

Description Use the dampening command to enable BGP route dampening and/or configure dampening parameters.

Use the undo dampening command to disable route dampening.

By default, no route dampening is configured.

The command dampens only EBGP routes rather than IBGP routes.

Related commands: reset bgp dampening, reset bgp flap-info,display bgp routing-table dampened, display bgp routing-table dampening parameter and display bgp routing-tableflap-info.

Examples # In BGP view, configure BGP route dampening.

<Sysname> system-view

[Sysname] bgp 100

[Sysname-bgp] dampening 15 15 1000 2000 10000

#In BGP-VPN instance view, configure BGP route dampening (the VPN has been created).

<Sysname> system-view [Sysname] bgp 100

[Sysname-bgp] ipv4-family vpn-instance vpn1 [Sysname-bgp-vpn1] dampening 15 15 1000 2000 10000

default ipv4-unicast

Syntax default ipv4-unicast

undo default ipv4-unicast

View BGP view

Parameters None

Description Use the default ipv4-unicastcommand to enable the use of IPv4 unicast address family for all peers.

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3Com MSR 50, MSR 30 manual Default ipv4-unicast, Examples # In BGP view, configure BGP route dampening, 961