I work on a 6000 seat network where unfortunately most seats have been placed in VLAN 1 - over 2000.
Occaisionally I will etherreal a switch port and see traffic between 2 hosts which we shouldn't see in a switched network.
I am assuming that the switch has blown its L2 forwarding table and has become a hub.
Is there a command which would tell me whether this was the case?
sh mac-address-table count seems to suggest that the switch still has plenty of room left :-
Total Mac Address Space Available: 7926
Obvioulsy I am busy sub-netting the network into smaller chunks.
I beleive setting port security etc would also help, but I would just like to be sure that this table blowing is in fact what is happening
Many thanks !