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DHCP updating Active Directory Integrated DNS

Posted on 2004-03-30
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Last Modified: 2010-04-11
Hi,

Background:
I will have two forests on the same site each with a root domain and a child domain.
Live.ads - Child.Live.ads
Test.ads - Child.Test.ads

I want to use Active Directory integrated DNS on domain controllers in each Forest.
I also want to use DHCP (and for this to update DNS)

Question:
How will the DHCP server know which DNS server to update and which zone.
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Question by:gnfreeman
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LVL 10

Expert Comment

by:anupnellip
Comment Utility
It is not the DHCP server which updates the DNS server , but the clients update your dns with there IP .

Do not use DHCP for your DC .

Check this for more detail

http://solutions.brother.com/Library/pdf/configure_W2K_DHCP.pdf
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Author Comment

by:gnfreeman
Comment Utility
I wasn't planning on using DHCP for servers only for clients.

From my understanding when using DHCP and DNS, a client will register its forward address with DNS and a DHCP server will register its reverse address with DNS. Or you can configure DHCP server to do both.

Let me expand my example.

Client Details (Test PC)
Name: TestPC1
Domain: Child.Test.ads
DNS server: LiveDC1 (Handed out via DHCP Server)

Client Details (Live PC)
Name: LivePC1
Domain: Child.Live.ads
DNS server: LiveDC1 (Handed out via DHCP Server)

Server1 Details (Live Forest DNS server)
Name: LiveDC1
Domain: Child.Live.ads
DNS Server: Authoriative for zone Child.Live.ads

Server2 Details (Test Forest DNS server)
Name: TestDC1
Domain: Child.Test.ads
DNS Server: Authoriative for zone Child.Test.ads

Server3 Details (DHCP Server)
Name DHCP
Domain: Child.Live.ads
DNS: LiveDC1
DNS: TestDC1

From my understanding the DHCP server is for the site(subnet) and not the Domain, so a single server could hand out IP Address from both Child Domains. How will the client and server update DNS??
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Accepted Solution

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fdisk_fixall earned 250 total points
Comment Utility
2000 & XP clients automatically update DNS by default.  The DHCP server needs to be configured to update DNS.  It knows which DNS server to update because that DNS server needs to be specified in the tcp/ip properties that theDHCP server is running on.  Anotherwords DHCP will update DNS based off of it's statically assigned DNS entries for the Local network connection.
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