Belkin F6D6230-4 v1 User Manual page 44

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Configuring your WAN Media Access Controller (MAC) Address
All network components including cards, adapters, and routers, have a unique
"serial number" called a MAC address. Your Internet Service Provider (ISP) may
record the MAC address of your computer's adapter and only let that particular
computer connect to the Internet service. When you install the Router, its own
MAC address will be "seen" by the ISP and may cause the connection not to
work. Belkin has provided the ability to clone (copy) the MAC address of the
computer into the Router. This MAC address, in turn, will be seen by the ISP's
system as the original MAC address and will allow the connection to work. If you
are not sure whether your ISP needs to see the original MAC address, simply
clone the MAC address of the computer that was originally connected to the
modem. Cloning the address will not cause any problems with your network.
Cloning your MAC Address
To clone your MAC address, make sure that you are using the computer that was
ORIGINALLY CONNECTED to your modem before the Router was installed.
Click the "Clone" button (1). Click "Apply Changes" (3). Your MAC address is
now cloned to the Router.