View Full Version : Missing DCs/GCs in AD Integrated DNS


Joe McDonald
11-04-2005, 06:44 PM
I've walked into a network with a number of issues the most mind-boggling to
me is some strange DNS happenings.

We have a flat domain spread across 9 sites. Each site has a DC that is a
GC and DNS is AD integrated. Two sites have secondary DC/GC for a total of 9
DC/GC servers.

In the Forward Lookup Zone for our domain, in the _TCP and _UDP containers
there are only 5 of our DCs are listed (_gc, _kpasswd, _kerberos, _ldap).

Under _MSDCS all DCs are listed with GUID of type CNAME
In the sub-container of DOMAINS/guid/TCP, there are only the same 5 servers.

In the sub-container of DC/_TCP the same 5 servers
In the sub-contraing of DC/SITES/sitename - the appropriate server(s) for
the site are listed.
In the sub-container of GC there are 6 A records matching 5 DCs/GCs (?)
In the sub-container of GC/_TCP the same 5 servers appear.
In the sub-container of GC/SITES/sitename - the appropriate server(s) for
the site are listed.

So....why do only 5 of 11 DC/GC servers appear?
Does this suggest a replication problem? Configuration related?

Anybody have an idea as to what may be happening and what I should be
looking at?

Thanks

Joe