All, My search-fu is failing, so I turn to you for help...
I have a small ESXi 5.5 host, about to go into production. The three VMs (2008R2 for all of them, a DC, Exchange 2010 and a PRTG box) on it can communicate with machines not on the ESXi host - ping, RDP, etc. - and vice versa. No problems. However, the three VMs on this host cannot talk with each other. No ping, no RDP. When pinging from one of the VMs to another, I get a mix of unreachables from the VMs own address and straight timeouts. There is only one vSwitch, which has two NICs bound to it, and the vswitch is set up to route based on IP hash. The physical switch to which they are connect (and this shouldn't matter, but...) is an HP 2510G-48, and the ports for the host are in a simple trunk - no LACP. I've turned off the Domain profile of the firewall on one of the machine, which seems to make no difference. I've examined the VMware host security settings to no avail. I've turned off the Windows firewall. I've got 3 ESXi hosts in a vSphere Standard cluster that doesn't have this problem. Kurt
