recently moved a DC in a seperate site from one subnet to another. This is 1 of 3 DC's, where the other 2 are located in a diff location, diff site. All 3 are GC's and all run DNS which replicates through AD. Each of these servers are listed to have themselves as the only DNS server within their NIC properties.
After moving the 1 DC to the new subnet, I began getting the following result when running nslookup for any IP/DNS name:
*** Can't find server name for address XXXXXXXXXX: Non-existent domain
Address: XXXXXXXXX (same as above IP, as this is the DC that I am running this on)
Name: XXXXXXXX (this is the correct FQDN)
Address: XXXXXX (this is the correct IP)
The "Unknown" is the issue, as it should be able to recognize its own name.... If i do a "hostname" in the command it shows up correct, and if I do an nslookup on any other DC or computer that is pointed to one of the other DNS servers it works just fine.
If I change this DC to look at one of the other DC's it will then show the correct Server rather than Unknown when running a DNS lookup.
I have a feeling that this is causing me issues on my Exchange server, which uses this server (the one that cant do an nslookup on its self) for DNS queries.