2.2.3.4.11 IpAddress

The IpAddress value specifies a valid IPv4 address in dotted notation which along with IpMask specifies the static address pool to be used to configure remote access clients and demand-dial peers. This registry value specifies the static address range if the StaticAddressPool registry is not configured. It MUST be defined under the following registry key. 

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\RemoteAccess\Parameters\Ip

This MUST be of type REG_SZ.