Proxmox - Windows Server 2008 VM's cannot ping each other
Posted on 2012-09-11
I have a Proxmox 1.9 server that we are going to be using to host 2 Windows Server 2008 VM's (one DC, one Exchange server). The server is a Dell PowerEdge R710 and everything seems to be fine. We did an initial install of a 'blank' Windows Server 2008 VM, backed it up with vzdump and then used qmrestore to clone that blank into each of our Windows Server 2008 VM's. We setup AD on the DC, joined the second VM to it and installed Exchange. All was well until we noticed that we had a typo in the domain name. No biggie. We shut down the two VM's, restored two more and started over. On the two newly created VM's though, they aren't talking. I can ping anything on the planet (including the IP assigned to vmbr0) and I can ping both of the VM's from the Proxmox console. I cannot ping between the two servers. If I do an arp -a, I do not see the 'other' server from either server. If I ping 10.80.10.255 (the broadcast), I do not see the 'other' server from either server. Each time, I just get destination host unreachable. If I add a static arp entry (arp -s <ip address> <mac address>), I get a request timed out. What am I missing?