Belkin F6D6230-4 v1 User Manual page 45

Entering a Specific MAC Address
In certain circumstances you may need a specific WAN MAC address. You can
manually enter one in the "MAC Address" page. Type in a MAC address in the
spaces provided (2) and click "Apply Changes" (3) to save the changes. The
Router's WAN MAC address will now be changed to the MAC address you
specified.
(2)
(1)
(3)