Assign static MAC address
Although Cisco switches dynamically build the MAC address table by using the MAC source address of the received frames, you can also specify a static address to add to the MAC address table. The static MAC entries are retained even if the switch is restarted.
To configure a static MAC address, the following command is used:
mac-address-table static MAC_ADDRESS vlan ID interface INTERFACE
For example, the following set of commands will assign the MAC address of 1111.1111.1111 permanently to the interface Fa0/2, VLAN 1:
To verify the configuration, we can use the show mac address table command: