Is it possible to configure a virtual network interface on Windows7?
On linux you can set up a virtual interface using
ifconfig eth0:0 ....
There's these questions:
How do you create a virtual network interface on Windows?
virtual network interface for windows
But they talk about vpn or loopback. VPN wont work in my situation as I'm trying to talk to a machine I don't have control over that sits on a hardwired subnet, which is not the one I get via dhcp. Loopback doesn't work as it doesn't actually talk to the physical device.
There's a hack on WinXP that lets you override dhcp by hacking the registry, but it was disabled in Win7 for security reasons.
Answer
For the record, the only solution we found at $WORK that actually solved the problem on Win7 (embedded) is a custom MUX (multiplexer) driver derived from source from Microsoft. That let us set up two different virtual adapters with the different configurations.
AddIPAddress doesn't let you add a static address to an adapter using DHCP in Win7 (it works in XP, but they disabled it in Vista).