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?