Symptom

Nexus 7000 runs high CPU on L2FM (the process manages MAC address in Nexus 7000). If 'logging level l2fm 5' is configured, the following message will be logged: %L2FM-4-L2FM_MAC_MOVE: Mac in vlan has moved from to

Conditions

The trigger of the problem is that a physical member of a port channel goes from individual mode to bundled mode. It requires "no lacp suspend individual" configured. This causes a hardware mis-configured on the switch.

Workaround

shut and no shut the related physical port of the port channel

Further Problem Description