Display FDB Entries
Display FDB entries using the following command:
show fdb {blackhole {netlogin [all | mac-based-vlans]} | netlogin [all | mac-based-vlans] | permanent {netlogin [all | mac-based-vlans]} | mac_addr {netlogin [all | mac-based-vlans]} | ports
port_list {netlogin [all | mac-based-vlans]} | vlan
vlan_name | vlan_list {netlogin [all | mac-based-vlans]} | {{vpls} {vpls_name}}}

Note
The MAC-based VLAN netlogin parameter applies only
for Summit family switches and BlackDiamond 8800 series switches. See
Network Login for more
information.
With no options, this command
displays all FDB entries. (The age parameter does not show on the display for the backup
MSM/MM on modular switches; it does show on the display for the primary
MSM/MM.)