I have three sites and four W2K3 R2 Domain Controllers. Site A has two domain controllers: DC1 and DC2. Site B contains DC3 and Site C contains DC4. I have set up DC1, DC3 and DC4 as bridgehead servers. My problem is that DC1 and DC4 will not see each other in AD Sites and Services. Replication appears to work be working, as updates to a user account on DC 1one will eventually get to DC4. Within AD Sites and Services, DC1 <> DC3 appears to be ok, and DC3 <> DC4 appears to be okay.
I thinkmy problem may be DNS related; I've never setup DNS for different sites/subnets. Here is the IP config:
DC1: 192.168.101.10/24 \
DC3: 192.168.105.10/24 - These are VLANS with a helper record.
DC4: 192.168.108.10/24 /
On my DNS servers (192.168.101.10 & .11) I have only one reverse DNS Lookup Zone: 101.168.192.in-addr.arpa. Should I have a reverse DNS Lookup Zones for each subsite also. And if yes, should I manually create them, delete the current DNS record for DC3 and DC4 and recreate it with the PTR box checked?