Asus DSL-N12HP User Manual page 146

2. The WAN IP settings screen provides access to the DHCP
server settings.
You can select the Obtain an IP address automatically
radio button to enable DHCP (use the DHCP Options only if
necessary). However, if you prefer, you can instead use the
Static IP address method to assign WAN IP address, Subnet
Mask and Default Gateway manually.
Click Next to continue or click Back to return to the previous step.
If IPv6 is enabled, the following will also be shown.
Enter information provided to you by your ISP to configure the
WAN IPv6 settings.
If "Use the following Static IPv6 address" is chosen, enter the static
WAN IPv6 address. If the address prefix length is not specified, it
will be default to /64.
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