It is hard to diagnose ifMAC flapping occurs when a bridge receives packets from different member member interfaces. The common reasons are:
- user roams from one bridge port to another
- user has wrong network setup, bridge loops e.g., org.
- someone set duplicated ethernet address foron his/her nic, or
- some bad guy / virus / trojan send spoofed packets on the wire.
Emit logs so that the symptoms will be obvious and it will be easy to diagnoseThe current implementation updates bridge routing entry silently hence it is hard to diagnose when any of them happen.
Emit logs when MAC address port flapping occurs so that it will be easy to diagnose.
MFC after: 2 weeks