This is the question http://serverfault.com/questions/449025/connectivity-issues-when-setting-guest-mac-to-the-same-as-the-host-mac-on-esxi-5 As some of you may see - this question has a little pragmatic problems: 1. This was not the original question I asked. The original question had a lot of miisng points. 2. After some people edited it (and answered at (and upvoted the answer)) - I edited the question again to show them that they don't understand something very basic which I am trying to do - instead they just pick on me for "arp poisoning" and doing bad things I shouldn't. 3. After more research for last response (from MDMarra) - the VMware station itself gave me a message to repeat the steps I stated at the question body. I think that this question was changed too much. It's a bit of a mess and it might mislead other readers.