Linksys WRVS4400N Manual page 48

MAC Address Clone
Some ISPs require that you register a MAC address. This feature clones your PC network
adapter's MAC address onto the Router, and prevents you from having to call your ISP to
change the registered MAC address to the Router's MAC address. The Router's MAC
address is a 6-byte hexadecimal number assigned to a unique piece of hardware for
identification.
Mac Address Clone. Select Enabled or Disabled.
Mac Address. Enter the MAC Address registered with your ISP in this field.
Clone My PC's MAC button. When Mac Address Clone is enabled, click this to copy
the MAC address of the network adapter in the computer that you are using to connect to
the Web-based utility.
Click Save Settings to save the MAC Cloning settings or click the Cancel Changes
button to undo your changes.