I have windows 2008 R2 Datacentre running with Hyper-V. A windows 2003 R2 guest VM sometimes has the NIC connectivity drop out, and it seems to become disabled. Has no network connectivity outside. Not sure of cause. If I restart the VM it seems to start working again. Possibly it dies in the middle of large network activity (file backup), but not sure of exact timing yet.
Didn't notice anything in the event logs. NC on host and other guest VMs still work fine.
Any ideas? It is not workable if the NIC always dies unexpectedly, and users have no network connectivity to the server.
Thanks!
Craig