We have a brand new PowerEdge T110 II server running Server 2008 R2 and Exchange 2010 as well as BackupExec 2010 R3. We have an issue were this machine will randomly disconnect from the network (no disconnect message is recorded in the event log and the switch lights don't go out). During this, all the network drives connected using DFS will failover to the 2nd server, but the Exchange system will just go offline until the issue goes away (usually about 30 seconds to 1 minute). We believe it is the network drivers, but we don't have a spare Intel NIC (We use on the onboard Broadcom one) to test with.
We know its not the switches because the internet works fine and the 2nd server is running Server 2003 R2 and it has ZERO issues.
Does anyone else have the same system with Server 08 R2 with this issue?