Sorry in advance for the novel.
I've got a Dell Poweredge 2900 III with two integrated Broadcom 5708C NICs. This server is running a very new and clean install of Small Business Server 2003 R2. We lease space in a University building, but are a private company. NIC A is connected to the building's (University's) network and providing access to the internet and has a static IP. NIC B is also connected to the building's network, but on our own VLAN on their switches for just our office computers.
The problem I am having is every hour or so, sometimes more frequently sometimes less, I lose all connectivity to the computer from the internet (NIC A). You cannot see the computer from outside our VLAN, cannot ping it, it's like the cable was unplugged. The only way I've found to restore the connection is to disable and then enable the network card. This does not happen on our internal VLAN (NIC B) at all.
I cannot for the life of me figure out why this is happening. I have updated the drivers from Dell's website, disabled power management on the NICs, poured over the event log for days and resolved any errors that have come up.
I *believe* this to be a configuration issue due to the fact that the server was working fine until I rebuilt it (reinstalled the OS) with a new domain name. It wasn't until after I did that procedure that this issue started. I also believe it to be a configuration issue because this same problem occurs, although much less frequently (every one or two weeks) on another server we have running plain Windows Server 2003. By that same token, I realize this may also be an issue from the building's network equipment but they claim they see no problems and I don't know what to ask them to look for.
Dell Support mailed me a new mainboard for the server.
So, any ideas? Thanks in advance!