Our DNS servers are all Win 2008R2 domain controllers, we have our main internal Zone mydomain.local plus an additional couple of forward lookup zones that are also AD integrated,
I am seeing an issue were some workstations are not able to resolve DNS records that are in these zones, yet the machine next to them can (all PC's are Win 7), also sometimes these same machines that are not working do in fact work, its intermittent,
I was notified that a web page was not working for a couple of users, when I tried to ping it from their machines I was getting host not found, however on the machines that were working it resolved, doing an IP config showed that they use the same primary DNS server.
if I do an nslookup on the machines that are working I get 2 timeouts before it resolves the name, not sure if that's relevant as it still works, all PC's are Gigabit connected and are on the same physical site as their primary DNS server.
Not really sure how to start troubleshooting this one, had a look on the DNS event log but nothing in there
Anyone got any idea's