Interfaces and Hardware Component Configuration Guide for Cisco 8000 Series Routers, Cisco IOS XR Releases

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Interfaces and Hardware Component Configuration Guide for Cisco 8000 Series Routers, Cisco IOS XR Releases

Enable IP event dampening

Updated: July 31, 2026

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This topic describes how to enable the IP Event Dampening feature on an interface by using the dampening command in interface configuration mode, and how to verify the configuration by using the show commands.

The dampening command is entered in interface configuration mode to enable the IP Event Dampening feature. If this command is applied to an interface that already has dampening configured, all dampening states are reset and the accumulated penalty will be set to 0. If the interface has been dampened, the accumulated penalty will fall into the reuse threshold range, and the dampened interface will be made available to the network. The flap counts, however, are retained.

Procedure

1.

Run the configure terminal command to enter the global configuration mode.

Example:

Router#configure terminal
2.

Run the interface type number command to enter interface configuration mode and configure the specified interface.

Example:

Router(config)#interface HundredGigE 0/0/0/0
3.

Run the dampening [half-life-period reuse-threshold] [suppress-threshold max-suppress [restart-penalty]] command to enable interface dampening.

Example:

Router(config-if)#dampening

  • Entering the dampening command without any arguments enables interface dampening with default configuration parameters.

  • When manually configuring the timer for the restart-penalty argument, the values must be manually entered for all arguments.
4.

Run the end command to exit interface configuration mode.

Example:

Router(config-if)#end
5.

Run the show dampening interface or show interface dampening commands to verify the configuration of the IP Event Dampening feature.

Example:

Router#show dampening interface

or

Router#show interface dampening

  • show dampening interface —Displays dampened interfaces.

  • show interface dampening —Displays dampened interfaces on the local router.