D-Link Go-RT-N300 User Manual page 26

Section 3 - Configuration
Default MAC:
Select to use the default MAC address assigned to the Internet port on your router.
MAC from PC:
Select to copy the MAC address from the computer you are currently on now to the router.
MAC manual:
Select to manually enter a MAC address to your router.
Apply
Click to save your settings.
Changes:
D-Link GO-RT-N300 User Manual 22