peer-dampening

Enables dampening of unstable BGP Peers globally for all neighbors (IPv4, IPv6 across all VRFs). Dampening can be enabled on all neighbors or on an individual neighbour/a peer-group. Dampening cannot be applied on dynamic peers.

Syntax

peer-dampening [ delay-hold 0-65535 | penalty 1-65535 | max-penalty 1-65535 | stability-interval 0-65535 ]

no peer-dampening [ delay-hold | penalty | max-penalty | stability-interval ]

Parameters

delay-hold 0-65535: The amount of time, in seconds, that a session remains in the idle-state after the first peer flap event is received. During this time, all route advertisements from this peer are ignored. The default value is zero (0) seconds.
penalty 1-65535: The amount of time, in seconds, which gets added to idle-hold timer every time a peer flap event is received. The default value is 300 seconds.
max-penalty 1-65535: The maximum amount of time, in seconds, that a session remains in the idle- state after it has experienced repeated instability. The default value is 3600 seconds.
stability-interval 0-65535: The interval of time, in seconds, the session must be error-free in order to consider it to be stable. The default value is 1800 seconds.

Modes

Router BGP

Usage Guidelines

BGP peer dampening can be global or on individual neighbor/peer-group.
All routes from a dampened peer will be removed from the routing table
When route dampening is also configured, peer dampening will take precedence over route dampening.
Dampening cannot be applied to dynamic peers.
Dampening cannot be applied to administratively down neighbors.
When downgrading to a firmware that does not support peer-dampening, an error will be displayed. You must remove this configuration to successfully complete the downgrade.

Examples

The following example shows how to enable peer dampening globally.

SLX (config)#router bgp
SLX (config-bgp-router)# peer-dampening delay-hold 10 penalty 300 max-penalty 3600 stability-interval 1800
SLX (config-bgp-router)#

The following example shows how to disable Peer Dampening globally for all peers.

SLX (config)# router bgp
SLX (config-bgp-router)# no peer-dampening 
SLX (config-bgp-router)#