I've migrated physical Ubuntu to Hyper-V 2012 with Acronis Universal Restore. It worked fine for a while till i rebooted machine. After reboot the network does come up:
But any ping or anything doesn't work. There's no firewall. I removed other networks from /etc/udev/rules.d/70-persistent-net.rules because i tried adding multiple interfaces after reboot broken the network and it kept adding more addresses. The IP Address is from DHCP and when I was adding new LAN it was getting new addresses every time. So I removed all interfaces and after reboot eth0 showed up with old ip address again from DHCP. Still no network...
Kernel is 2.6.32-41.
Keep in mind it worked just prior reboot and that I have very little knowledge about Linux. I'm Windows guy.