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DNS migration

i am new to DNS and i have an internal dns server that is running on our domain controller win2k3.
- Is there a way to isolate that dns server to an entirely new machine with win2k3 server installed?
- Since our ISP has two dns servers is there a need to have an additional perimeter dns server?
2 Solutions
You could copy your zone files from one server to the other, and then do the same with the registry settings that hold the zone information....

But an easier way that I like is to create a new zone on the new machine as a secondary zone. Point to the first server as the source, and transfer the zone to the new machine. Then after the zone is transferred, change it to a primary zone.

If your zone is an Active Directory Integrated zone, and the new machine is also going to be a domain controller, the DNS information will be replicated with the rest of Active Directory.
If your DNS is Active Directory-integrated, it will be automatically replicated to all other domain controllers in your domain by default.  (In 2003 Active Directory you can customize this so that it will only replicate to DCs in the domain that have the DNS server service installed on them, or DCs in the entire forest that have the DNS server service installed on them.)  

If you install a new machine to function as a DNS server and your current DNS is AD-integrated, you have two choices:

[1] Configure the new machine as a DC, and it will automatically replicate the existing DNS data.
[2] Configure a secondary zone on the new machine, which will replicate a read-only copy of the DNS data from your DCs.

As to your second question - your ISP's DNS server does not contain any records relevant to your internal resources or Active Directory, so you will need to run internal DNS in order to allow your internal clients to authenticate to AD and locate resources.

If you are new to DNS, I recommend perusing the links and white papers on this site before making any configuration changes that you're not 100% clear on: http://www.microsoft.com/technet/network/dns/default.mspx

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