We have a strange problem with an interaction between our Hyper-V virtual host and the hosted virtual servers. Both virtual hosts and virtual servers are running Windows Server 2008.
When a virtual server is added to a MS NLB instance, the entire virtual host panics and shuts down. The MS NLB is configured in unicast mode, so each node shares a common MAC address. From what our sys admins can tell, the virtual hosts panic when the MAC address of the virtual network devices is changed by MS NLB.
I think a MAC address conflict within the virtual host is causing the problem – six virtual nodes in the NLB cluster are hosted on only two physical hosts. (I know this makes no sense. I didn’t do it.)
Has anybody ever heard of this problem and how do you recommend solving it?
I was just ran into an answer to this problem if you are still looking.
http://support.microsoft.com/kb/953828
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