Edimax Technology ES-3124REM - Manual (Page 70)

70
2.8 MAC Address Configuration
2.8.1 Static MAC Address
When you add a static MAC address, it remains in the
switch's address table, regardless of whether the device is
physically connected to the switch. This saves the switch from
having to re-learn a device's MAC address when the
disconnected or powered-off device is active on the network
again.
In this page you can add/modify/delete a static MAC address.