Windows Phone 8 SDK IPv4 Problem
I ran into trouble the first time i launched the emulator.
“Xde could'nt find an IPv4 address for the host machine”
In my case the problem was: I had a Cisco VPN network adapter that was disconnected (since I wasn’t connected to a VPN at the time).
Uninstalling Cisco VPN solved the issue for me (and another guy that had the same problem).
Hope this helps anyone running into the same problem.