Administrator Guide

max-suppress-time should be at least 4 times half-life.
Link dampening:
● reduces processing on the CPUs by reducing excessive interface flapping.
● improves network stability by penalizing misbehaving interfaces and redirecting traffic.
● 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 configured for port monitoring.
● You can apply link dampening to Layer 2 and Layer 3 interfaces.
● You can configure link dampening on individual interfaces in a LAG.
Configuration Example of Link Dampening
The figure shows a how link dampening works in a sample scenario when an interface is configured with dampening. The
following figure 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
Interfaces
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