I have a weird issue with my Exchange server. The network connection for Outlook Web Access seems to lock up at times. The NIC reports that everything is fine, no logs in event viewer, just noone can connect to OWA until I log on the server and do a Repair on the NIC. I tried switching the NIC with another that is in the same server and it still does it with the other NIC. The 2 NICs are from different manufacturers so I am pretty sure that it is not a driver issue. The NIC that had the problem to start is still working fine since the switch.
Sometimes the NIC is good for a few days other times it lasts a few hours. There are no issues in Device Manager and no Event Viewer entries.
Dell PowerEdge 2950
Windows Server 2003 Enterprise with SP1
original NIC is a Broadcom BCM5708C NetXtreme II GigE (NDIS VBD Client) built into the motherboard
Replacement NIC is Linksys EG1032 v3 Instant Gigabit Desktop Network Adapter
Hopefully someone can offer some solutions.