I have an ESXi 5 host with 3 virtual copies of Windows Server 2008R2 running on them. The ESXi host is connected to my switch, which has the Windows 2008 R2 DC for my test network and my management laptop with VSphere connected to it as well. I can ping the host, laptop, and AD server from each of the individual virtual servers and can ping and RDP to all 3 from any other device not on that host, but I can not communicate between the three. I have Windows Firewall disabled on all three. I have no firewall, and all machines have a private IP address in the 10.0.0.X range. I've deleted and recreated the single virtual switch on the host that all 3 are contained on. I've been HIGHLY frustrated for the past 3 days on this. Why can't my VM's talk to each other?
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