Nov 16 02:55:05: %C4K_L2MAN-6-INVALIDSOURCEADDRESSPACKET: (Suppressed 674 times)
Packet received with invalid source MAC address (00:00:00:00:00:00) on port Gi7/
3 in vlan 20
I keep receiving this log message on a core switch which I have just upgraded to 12.2.25EWA3. When I trace the log through int g7/3 to one of our access switches, the mac address is not in the mac-address-table.
The log message is not present on the access switch, IOS 12.2.20EWA.
Anyone seen this type of message before and resolved the issue? I have tried the output interpreter but it didn't shed much light on the problem.