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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


Description (partial)


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


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


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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