Allied Telesis AT-S39 - Manual (Page 140)

Chapter 14: MAC Address Commands
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The following command displays just the multicast addresses:
show switch fdb status=multicast
The following command displays the port number on which the MAC
address 00:A0:D2:18:1A:11 was learned (dynamic) or added (static):
show switch fdb address=00A0D2181A11
The following command displays the dynamic MAC addresses learned
on Port 11:
show switch fdb port=11
The following command displays the MAC addresses learned on the
ports in the Sales VLAN:
show switch fdb vlan=sales