Here's the background:
I have a Dell T410 Server with Win Server 2008 R2 on it. We work in a University setting where there are several layers of IT "responsibility" -- we have a University IT unit, a campus IT unit, a College IT unit, and IT personnel within various working groups (research groups, admin groups, etc.)
The campus IT unit assignes us a 64-address IP segment (xx.xx.x9.128 - xx.xx.x9.191 where .128 and .191 are reserved and .129 is the gateway) and the campus DNS server is xx.xx.2.131 and the WINS servers are xx.xx.5.30 and xx.xx.5.31.
We recently moved from one physical location to another location. Unfortunately, our network segment was tied to a specific building switch so our IP addresses no longer worked in the new location. Instead, we reconfigured and used the local building's DHCP services and were able to connect with no fuss, no muss. While I waited for the campus IT unit to move our network segment, I was able to do some upgrades to the Server 2008 R2 (so I know the hardware worked...)
About 7 days ago, the Central networking office switched our network segment and bound our segment to the appropriate port in our new building. I went into the server, edited the network adapter configuration to a manual config using:
xx.xx.x9.132 as the IP address,
255.255.255.192 as the net mask,
xx.xx.x9.129 as the gateway,
xx.xx.2.131 as the primary DNS server,
and xx.xx.5.30 as the primary WINS
and xx.xx. 5.31 as the secondary WINS
As expected, I have to reboot for the changes to take effect.
I reboot and something unexpected happened. I have no connectivity and when I look at the settings, the DNS server address (xx.xx.2.131) is gone. All of the other settings are stored, but it's gone. I flushed the DNS cache (using "ipconfig /flushdns" as an administrator), re-entered my DNS address and (again) rebooted. Same results. I've tried this about 4-5 times and have tried several other suggestions, (different jacks, cables, unplugging the power before rebooting, etc.) but nothing seems to work. I've consulted with the campus IT unit and with several College IT people too, but no one seems to understand what's happening.
Although this is a research machine and has NO production data on it yet, I'd rather not reformat and reinstall if I can avoid it because I have several virtual servers configured (not running since before our move to the new location) and I'd rather not have to do this all again.
Ideas? It *seems* like I came across this issue ages ago, but I can't find anything in my notes about it... the frustration level is getting HIGH. Any help would be greatly appreciated!