DHCP shows for Static IP in Network properties

I inherited a Dell Poweredge T620 server with an odd problem. There are several symptoms:
- If I configure a static IP address in the Network properties dialog, exit and go back in, "acquire" (DHCP) is selected. The static IP appears to stick, however.
- Strangely enough, if I enter a different static IP and, then go to status, all previously configured IPs show along with the current one (see picture).
- Even more bizarre, I can ping the previously configured IP addresses, even if I had them entered as a momentary test (like
- DHCP service is not servicing requests, though it appears to be working properly OK.

Here are the details:
I needed to change the server's Ip address, from I did that, reconfigured the DHCP scope, DNS zone. It was at the end of this process that DNS worked, but DHCP didn't. I ended up removing the DHCP role, then readded. I did get an error message that the authorization of the DHCP server failed with error 20079 (the specified servers are already present). BUT, I can go and deauthorize, then authorize the server just fine, and no further such error messages are being logged. In fact, when I reboot, the log states that the DHCP server is servicing requests (it is NOT). For now, I'm using the router as a DHCP server.

On the attached image, you'll see the Intel Gigabit network adapter, and 3 IP addresses (some masks), of which only is current and legitimate. Yes, I can ping all of them on the server.

Any thoughts?
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Lahiru NanayakkaraManager - Technical Services Commented:
Try this command,

netsh int ip reset c:\ipresetlog.txt

This will rewrite registry values of TCP/IP / DHCP Parameters

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btm02sfAuthor Commented:
Thank you - will try this Friday and I'll let you know.
btm02sfAuthor Commented:
That didn't really work. After restarting, the server didn't have any IP address (169....) and though the properties page was set to automatically acquire, that didn't happen.

I set the IP manually, but at least one of the symptoms is persisting: if I close all dialogs and go back in, it doesn't show the IP as set to "static", but rather still "dynamic". At this point rebooting the system is OK, the pseudo-static IP remains when I log back in.
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