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 172.16.22.4).
- 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 192.168.1.2. 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 172.16.22.3 is current and legitimate. Yes, I can ping all of them on the server.