We ran into a problem with duplicate dynamic MACs in our 2008 R2 Hyper-V cluster. We restarted a server and when it came up, it had a MAC that another VM had on another Hyper-v host in the cluster. To get out of the problem, I shut the machine down and assigned the machine a static MAC.
After further reading, it appears that I probably should have just restarted the machine and let it pick up a new dynamic MAC from the pool on the Hyper-V host where it resided. It still makes me wonder why another machine had the same dynamically assigned MAC and neither of the VMs wanted to change.
Has anyone struggled with this before?
Orange County District Attorney
