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We have moved our physical servers to virtual servers on hyper-v. We were running the Ubuntu servers for few years without any issues. However since we have shifted the servers, the network connectivity started dropping suddenly and in a random behavior. Once the issue occurs, the server can't ping or ssh any server in the local or external lan. Even restarting the network doesn't work. I can't find any errors when I check the server logs. The only solution to get the server running again is to restart it. Those servers are very critical to the university since they run MySQL and LMS. So any help is really appreciated.

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Hello! So, this problem if affecting all your servers in your virtualized environment or just one? Let's try one thing. Once the problem starts, before you reboot, please run "dmesg > /root/dmesg". Then, reboot the system and pastebin this created file and attach the link to your question please. You can use the command pastebinit "cat /root/dmesg|pastebinit". – Paulo Arruda Nov 23 '11 at 13:28
Oh, a pastebin of dmesg output of your HOST machine at the same time would be useful too. – Paulo Arruda Nov 23 '11 at 13:30
This question appears to be abandoned, if you are experiencing a similar issue please ask a new question with details pertaining to your problem. If you feel this question is not abandoned, please flag the question explaining that. I am flagging this for closure. Regards, – Ringtail Apr 4 '12 at 5:34

closed as too localized by Ringtail, Call me V, jrg♦ Apr 5 '12 at 20:00

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