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2008 DNS - Switching to AD stored zones

Posted on 2011-09-08
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Last Modified: 2012-06-27
Our school district has 40 sites, originally utilizing a seperate NT4 domain in each site.  We then upgraded to Windows 2000, and converted to a parent domain and 39 child domains.  (we are working on a plan to finally go to a single flat domain, but that will take time..)  
In the present model, each domain including the parent has its own DNS zone, integrated into AD, but only replicated to DCs in that domain via AD.  Each child domain has a secondary zone (file-based) for the parent domain, replicated from the parent domain DNS servers. Delegation records in the parent DNS zone for each child zone finish the picture.  DNS resolution is complete, and works well, BUT it's a pain to maintain!

Now that we have finally eliminated the last Windows 2000 DC, (and all but two of the 2003 DCs) I am interested in switching to a DNS structure entirely stored and replicated by DNS.  Nothing I've read, so far, answers two questions I have:
1. Currently, when we install a new child-domain DC, DNS is autmatically configured with the domain's DNS zone.  Then we have to manually add and configure the secondary zone for the parent domain.  If the parent domain was set to replicate to all DCs in the forest, would that secondary zone also be automatically created?
2. How would I manage the switchover?  After I set the parent DNS zone to replicate to all servers in the forest, what changes would I have to make to the child domain DNS servers?  (There are a lot of them...)

Dann Cox,
Infrastructure Administrator,
School Distruict 68
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Question by:danncox
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6 Comments
 
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Expert Comment

by:SuperTaco
ID: 36507185
before I answer anything, are any of your DNS zones AD integrated?
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Author Comment

by:danncox
ID: 36524636
As stated,  each domain's own zone is AD-integrated, but only for that domain - none are set to replicate to the entire forest.
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Expert Comment

by:SuperTaco
ID: 36525328
You could try creating stub zones for each sub-domain in every other domain.
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Author Comment

by:danncox
ID: 36526532
I am not sure how this would work - Reading the MS info on Stub zones, they only mention stub zone in the parent for the child zones, not the other way around.  If so that would not help much?
I'd better go do some more reading on stub zones.

Dann
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Accepted Solution

by:
danncox earned 0 total points
ID: 37779785
I wasn't really getting much information, here or elsewhere, so created a test child-domain and did some testing.  At least in our forest, setting the parent domain DNS to publish to all DNS servers in the forest worked.  We did have to go to each child-domain DNS server, and remove the (file-based) secondary zone for the parent domain.  After re-starting DNS, replication quickly replaced the zone from AD.
We have left the delegation records in place for the child domains, as we are moving fairly quickly to get rid of child domains.
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Author Closing Comment

by:danncox
ID: 37795216
worked it out myself - Stub zones may have been the answer, but I never really figured them out.
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