Virutal Machine loses network connectivity on Hyper V

Posted by Chris W on Server Fault See other posts from Server Fault or by Chris W
Published on 2010-03-24T09:02:55Z Indexed on 2010/03/24 9:03 UTC
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Filed under:

hyper-v-server-2008-r2

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hyper-v

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connectivity

We're running a number of VMs on a 6 node failover cluster of blades using Hyper V.

We have an intermittent issue (every few days at different times - not a fixed frequency) of VMs losing network connectivity. Console access to the VM suggests all is fine and the underlying blade has normal connectivity. To resolve the problem we either have to re-start the VM or, more usually, we do a live migration to another blade which fires up connectivity and we then migrate it back to the original blade.

I've had 3 instances of this happen with a specific VM running on a particular blade however it has happened once with a different VM running on a different blade. All VMs and blades have the same basic setup and are running Windows 2008 R2.

Any ideas where I should be looking to diagnose the possible causes of this problem as the event logs provide no help?

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