ESXi 5.1.0, I've got two vswitches, vswitch0 (vm network1) has one vmnic0 10.2.3.15, vswitch1 (vm network2) has vmnic2, 10,2,3,0-10,2,3,254.
I've got 3 VM's, all using VM network2, Windows 2003, Windows 2008 and Ubuntu 12.10
The ubuntu machine pang ping out, I can ping it from outside the hypervisor. The two windows hosts cannot do either. It is not the Windows firewall.. I've checked that its disabled but also I've got a GPO that disables that service.
With the Linux vm being able to talk to the rest of the network it makes me think it's windows VM related.. but Ill be damned if I can find it. The latest VMtools are installed on both windows hosts too. Their both static'd IPv4 addresses. I tried DHCP but it failed to pull a valid address and went instead to autoconfigure 169.x.x.x