Symptom

Bridged unicast traffic to physical ACs may fail to converge after a topology change on Trident cards until MAC addresses age out. Also, after bridge flush, traffic to some destination MACs may continue to flood for up to 2.5 minutes.

Conditions

A learned MAC address on a physical AC can become stale when a topology change occurs. This MAC address is no longer reachable through the bridge port it was learned on, so frames destined to this MAC need to be flooded until the MAC address is relearned on its new port. The failure prevents the traffic from being flooded until the original MAC address ages out. For the flooding issue, sometimes a bridge flush while traffic is flowing could leave some destination macs in a flushed (stale) state. Traffic to these MACs will flood until the next aging refresh occurs, which could be up to 2.5 minutes.

Workaround

None

Further Problem Description