Given the following scenario: 2 W2k8 DCs, each in a different site with own subnet. What are the DNS client settings I should use? The best practice analyser says the the DC should not have itself as first DNS server, but I have also read that the DCs should use the same DNS server as primary server. Obviously, I cannot implement both recommendations at the same time with 2 DCs, so an external DNS server would be the only option.
It's been a long time since I've taken the class, but the setup I've used for years is this. I'm assuming you are using the DCs as DNS servers for client machines.
- Each DC's network settings point to itself ("real" IP address in 2k, 127.0.0.1 in > 2k3)
- Each DC's DNS resolver settings point to a close-by DNS server, e.g. your ISP's.
- AD will take care of replicating internal domain addresses among each DC. Let someone else take care of replicating the resolver data.