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Cisco Bug: CSCtc66923 - High CPU usage when over-provisioning CFM

Last Modified

Jan 16, 2017

Products (1)

  • Cisco 12000 Series Routers

Known Affected Releases

4.0.0.BASE

Description (partial)

Description:

Over-provisioning CFM MEPs on a line card may result in very high CPU usage by the cfmd process.

Symptoms:

The cfmd process uses a large amount of CPU, and the line card may become unresponsive, for example to configuration or show commands.

Conditions:

The problem can occur when the combined packet rate for the CFM MEPs on the line card exceeds 2000 packets per second. The combined packet rate is a function of both the number of MEPs configured on interfaces on the line card, and the configured CCM interval for those MEPs.
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