LevelOne VOI-8001 - Manual (Page 89)

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Request IP address
You can specify the IP address you desired. But the ISP has the right to
neglect it and provides you a different one.
MTU (576-1500)
You can specify the MTU (maximum transmission unit) of your home
gateway. The default value is 1500 bytes and in normal case, you don’t
have to change.
MAC Cloning
Some ISPs will identify the MAC address registered by the user. If not
registered, the ISP won’t allow the traffic to pass. Enable the MAC
cloning function will change WAN MAC to the registered one.
MAC Address
The MAC address will be cloned.
Clone MAC Address
This button is use to detect the PC, which is browsing this page, and make
its MAC address to be the MAC address to clone.
B. Static IP Address