We see intermittent ESXi 4.1 disconnects from Vcenter; ping works ok. Any hints.
Does the ESXi host disconnect and reconnect, or does it stay in a disconnected state?
Are disconnects isolated to specific set of ESXi hosts, a specific cluster, or are the disconnects appearing across all of your hosts/clusters?
When the ESXi host is in a disconnected state, are you able to login directly to the host using the vSphere Client?
Are you seeing any messages or errors being recorded in the vCenter Event logs regarding these disconnects?
Can u share the curent ESX Host logs which is having problem.