Experiencing random intermittent packet loss on Server08 SP1 with Hyper-V host management interface and occasionally a user connecting to a VM complains their connection is dropped. I read the Robert Larson article on MAC address duplication (and I believe that may be the problem However, there are 8 such host servers already deployed. How do I fix what is already deployed---step-by-step. Can I email you a spreadsheet showing the MAC addresses and NIC settings to get a better idea of what's involved?
Most likely, the first host to be issued an IP would work and the other wouldn't. Many IP stacks validate an IP issued to them by a DHCP server by pinging they address. If there's an answer, they don't use the address. Many DHCP servers can be configured to do the same thing before issuing an address to a client.
I'm curious, do you have some requirement for hosts to use the same MAC? Or did you just find yourself with two NICs with the same MAC? In the latter case, most modern NICs allow you to change the MAC.
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