I have vSphere vCenter and add just one host (all with U1) (patched with ESXi400-200912001.zip cause can't connect the host to vCenter before apply that patch to the host) but host disconnect frequently. I mean, I connect the host to the vCenter and all is fine, after about 1 min, host disconnect and don't know why. If I connect with the vClient to the host, the vClient keep the connection with the host, so the problem is the vCenter-Host. I already increase the timeout without any change, of course, if network is 1G and the server aren't doing nothing... yet ;).
I haven't license yet but still have lot of evaluation days, vCenter on XP SP3 and the host don't have any VM.
Any idea how can I solve this?