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Im lost and desperate. I have been running with a setup where i have a ubuntu server running in hyper-v. My windows server running hyper-v has two network cards. my internet is coming in to one of them and the other is hooked up with a switch. I then direct both to the ubuntu-server running in hyper-v. Ubuntu uses iptables and serve as a router and a dhcp server.

It have all been running fine until now, where i had a issue and had to reinstall windows. Therefore i exported my ubuntu virtual server and imported it again after install. My problem is that somehow theres some setting i might have forgot, because it simply do not work.

Anyone who might be able to assist me in finding the issue.

Other hyper-v pcs do get ips from the ubuntubox. but the local machines hooked up to the switch just idle saying network not identified and get some random ip.

I assume the issue can not be within ubuntu as nothings changed there.

If i ping, i get ping: transmit failed. general failure.

I know its not easy to help with this one, but any help will be nice.

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when you reinstalled hyper-v did you recreate the guest networks with the exact same name? –  tony roth Mar 4 '12 at 19:06
    
No, but i reassigned the network adapters in the settings after import. –  s093294 Mar 4 '12 at 20:42
    
The eventlog shows some criticals: 'NAME' was reset because of unrecoverable error occured on a virtual processor that caused a triple fault. eventid 18560 –  s093294 Mar 4 '12 at 21:47
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