Hi All,
I have a multi domain environment. A root domain and five child domains. the environment has been upgraded from Server 2000 to server 2008r2 over the years. we are currently running mixed mode with about 30 DCs spread across the world - all apart from 2 are 2008 r2. the other 2 are 2003 r2 SP2. I am having issues with resolving hosts in my root domain from my child domain. some facts;
naming
root.domain.local
child1.root.domain.local, child2.root.domain.local, child3.root.domain.local etc
1. All DNS servers have forwarders setup to locally managed UNIX name servers that live in our DMZ. External name resolution works perfectly.
2. DNS servers in some child domains have conditional forwarders setup for the root.domain.local with a replication scope of all DNS servers in this domain. These DNS servers can resolve hosts in my root domain find.
3. Other DNS servers don't have any conditional forwarders setup for the root.domain.local namespace. These servers (and clients using these servers as DNS servers) can not resolve hosts in the root domain.
I was under the impressions that we would NOT need conditional forwarders to resolve hosts in the domain above as it walks the tree up. Obviously this is wrong - can someone else confirm.
FYI - my root.domain.local forward lookup zone in the root domain is NOT replicated to the entire forest (I thought this was best practice) but it AD integrated so it replicates through that domain.