Windows 2012 hyperv guest missing network connection after restore from backup

I am testing restores of a small hyperv windows 2012 server with the typical one host, two guest os (dc and apps) setup. However the DC is not handling DHCP, or any other normal domain controller tasks (this is lab setup which is not fully implemented). All three OS's have static ips. The backup is performed on the host server. When I restore to a different computer the only place it falls down is that the hyperv guests don't have any connection to the network. The settings on the hyperv manager side look like they do on the original box, but inside the guests in network properties there is nothing listed in the adapter settings area. I've tried twice with the same results, both windows server backup and a third party backup product. Both original and restore pcs are workstations not server boxes; and they are not identical. What I'm attempting is so routine that I suspect the solution will be simple.

I have tried removing the virutual switch on the host, adding a new external virtual switch, removing the old virtual switch from the vms and adding the new switch to the vms, but it has not helped.

June 28th, 2015 12:09pm

Hiya,

Wouldn't this be expected behavior? - As the MAC address would change, thus the O/S is not able to recognize the NIC's as the same and then unable to do the mapping from backup.

I guess you will end up with ghost NIC's on your guests.

Could you please remove the NIC's from the guests machines and add new ones and connect these to the host and see if this resolves your issue.

I do think that this is host related, but guest related.

And I would expect the same thing to happen, if you restored a physical machine to new hardware.

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June 29th, 2015 3:41am

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