Well, I finally found out how to do this. In typical MS fashion, it is obscure as well as undocumented. The subnet mask is indicated by a slash IP address, and the default gateway is defined in the Route section. /24 would equal 255.255.255.0. /16 would equal 255.255.0.0 and so on. Similar to what you would see in a router configuration. I don't think you need the metric parameter in the Route section, but it doesn't hurt if you do have it. Note: both the IP address and DNS server info is added in pass 4 - Specialize. In the configuration below, the IP address info you would end up with would be: IP address - 10.90.10.36 Subnet Mask - 255.255.255.0 Default Gateway - 10.90.10.1 (notice the zeros used for identifier and prefix) ------------------------------------------------------------ <component name="Microsoft-Windows-TCPIP" processorArchitecture="x86" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> - <Interfaces> - <Interface wcm:action="add"> - <Ipv4Settings> <DhcpEnabled>false</DhcpEnabled> </Ipv4Settings> - <UnicastIpAddresses> <IpAddress wcm:action="add" wcm:keyValue="1">10.90.10.36/24</IpAddress> </UnicastIpAddresses> <Identifier>Local Area Connection</Identifier> - <Routes> - <Route wcm:action="add"> <Identifier>0</Identifier> <Prefix>0.0.0.0/0</Prefix> <NextHopAddress>10.90.10.1</NextHopAddress> <Metric>20</Metric> </Route> </Routes> </Interface> </Interfaces> </component> ---------------------------------------------------------------------- DNS Server configuration: - <component name="Microsoft-Windows-DNS-Client" processorArchitecture="x86" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> - <Interfaces> - <Interface wcm:action="add"> - <DNSServerSearchOrder> <IpAddress wcm:action="add" wcm:keyValue="1">10.90.10.10</IpAddress> <IpAddress wcm:action="add" wcm:keyValue="2">170.255.254.242</IpAddress> </DNSServerSearchOrder> <DisableDynamicUpdate>false</DisableDynamicUpdate> <DNSDomain>arbor01.com</DNSDomain> <Identifier>Local Area Connection</Identifier> <EnableAdapterDomainNameRegistration>true</EnableAdapterDomainNameRegistration> </Interface> </Interfaces> </component>