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You may want to create a child domain and then delegate the Domain Name System (DNS) namespace to a domain controller located in this child domain for any the following reasons:
Added DNS servers can reduce network traffic.
Added DNS servers can provide redundancy.
Active Directory namespace delegation and DNS namespace delegation remain consistent, simplifying your overall namespace design.
NOTE: When you delegate zones within your namespace, you need to create delegation records in other zones that point to the authoritative DNS servers for the new zone, and this needs to be done for each zone you create.
This article describes how to create a child domain in Active Directory, and how to delegate your DNS namespace to a domain controller located in this child domain.For a successful delegation to occur, it is important to complete the steps in the order listed.
NOTE: Global catalog and domain records exist only in parent (root) DNS server.
Manually Create a Delegation for the Child Domain on the Parent (Root) DNS Server
Right-click the root zone, click New Delegation, and then click Next.
Type the domain name for the child domain, and then click Next.
Add the child DNS server to host the new zone, and then click Next.NOTE: A domain controller that is a DNS server should have a static Transport Control Protocol/Internet Protocol (TCP/IP) address. Verify that this step is performed before you install DNS on the child domain controller. If no DNS TCP/IP address exists, DNS is installed as a root server. If you see that a "." folder is created after you install DNS, you must remove the root configuration.For additional information about how to do this, click the article number below to view the article in the Microsoft Knowledge Base:
229840 DNS Server's Root Hints and Forwarder Pages Are Unavailable
On the child domain DNS server, right-click My Network Places, and then click Properties.
Right-click the appropriate local connection, and then click Properties.
Under Components checked are used by this connection, click Internet Protocol (TCP/IP), and then click Properties.
Click Use the following DNS server addresses:, and then type the TCP/IP address of the parent (root) DNS server.