We're running a Windows Server 2003 R2 SP2 with VMWare Server 1.0.2. All times of the day and night we'll get a SNMP message to say the server has gone offline, pinging by name and IP, no response. Ping the virtual machines which are hosted on that box though and these all work ok, no loss of connectivity at all. Usually within a few minutes connectivity will be restored of it's own accord. There's nothing in the Event Logs which seems to correspond with the times it's reported as being offline. There's only one NIC in use on the server so the VM's have to be talking out from the NIC we can't ping when it goes offline!
Anyone got any ideas?