Concept Guide

• reduces processing on the CPUs by reducing excessive interface apping.
• improves network stability by penalizing misbehaving interfaces and redirecting trac.
• improves convergence times and stability throughout the network by isolating failures so that disturbances are not propagated.
Important Points to Remember
• Link dampening is not supported on VLAN interfaces.
• Link dampening is disabled when the interface is congured for port monitoring.
• You can apply link dampening to Layer 2 and Layer 3 interfaces.
• You can congure link dampening on individual interfaces in a LAG.
Conguration Example of Link Dampening
The gure shows a how link dampening works in a sample scenario when an interface is congured with dampening. The following gure
shows the interface state change, accumulation and decay of penalty, and the interface advertised state based on the set dampening
parameters. The dampening parameters are set as follows:
• half-life— 10 seconds
• reuse-threshold—300
• suppress-threshold—2400
• max-suppress-time—60 seconds
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Interfaces