I have a Dell Poweredge 2850 running Windows Server 2003 SP2 and is one of our AD controllers. In addition to AD it also does some print serving and is our management server for Symantec Endpoint Protection. Out of the blue I have lost all network connectivity to it. It is running on a static IP. I can ping its own address but when I try to ping other addresses I get "Destination host unreachable".
From another computer I have set up a continuous ping to the server. I get Request timed out.
However, when I reboot the server and I see on the screen, "Preparing network connections" the continuous ping receives a reply from the server. When the screen changes to "Applying computer settings" the continuous ping changes back to Request timed out.
So something in Windows is hosing the network stack on the server. I've tried the following:
-removing all Windows updates from the last two months
-stopping all non-Microsoft services
-replaced the nic
-replaced the cable
-tried plugging into a different switch port
-tried plugging into a switch
-updated nic drivers
-tried using DHCP instead of static address...no connectivity
I can't think of anything else to try.