I upgraded a 2003 R2 enterprise server, a single domain controller in its own forest (in nutshell one machine in the whole forest) before the upgrade I could ping, remote desktop to it. Everything worked fine.
After I upgraded to Windows 2008 R2 server, I cannot see, or ping it. Time out is all I get.
Firewall is OFF, services =disabled.
DNS Client,Function Discovery Resource Publication,SSDP Discovery, and UPnP Device Host services are running.
NIC driver up to date. From the server I can go out and ping anything successfully. From LAN cannot do anything.
David