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Because Windows uses DNS to resolve the IP address for servers and services, changing the IP addresses of the servers should be ok. &nbsp;Make sure you check in DNS after you make the change to make sure the records updated properly.<br />
Also, make sure that the new server is configured as a Global Catalog and has all FSMO roles assigned to it if you plan to remove the old server from the domain.
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Because Windows uses DNS to resolve the IP address for servers and services, changing the IP addresses of the servers should be ok.  Make sure you check in DNS after you make the change to make sure the records updated properly.
Also, make sure that the new server is configured as a Global Catalog and has all FSMO roles assigned to it if you plan to remove the old server from the domain.

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I am agreeing with Omarfarid by the way, I just wanted to provide some additional information if you needed it.
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I am agreeing with Omarfarid by the way, I just wanted to provide some additional information if you needed it.

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I wish to interchange the IP addresses between two DCs. One is an old DC (Windows 2000, original DC) which currently runs WINS and DNS. The other is a new DC (Windows 2000) on which I intend to install DNS and WINS and &nbsp;make it the new FMO.<br />
The reason I wish to change the IP addresses is that I have many computers and defined connections which currently point to the DNS and WINS server on the old DC. If I can interchange the IP addresses it will mean that there are no changes required on any of the PCs.<br />
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Are there any problems that you can see in doing this?
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I wish to interchange the IP addresses between two DCs. One is an old DC (Windows 2000, original DC) which currently runs WINS and DNS. The other is a new DC (Windows 2000) on which I intend to install DNS and WINS and  make it the new FMO.
The reason I wish to change the IP addresses is that I have many computers and defined connections which currently point to the DNS and WINS server on the old DC. If I can interchange the IP addresses it will mean that there are no changes required on any of the PCs.

Are there any problems that you can see in doing this?

Swapping DCs by interchanging their IP addresses

The Microsoft Server topic includes all of the legacy versions of the operating system, including the Windows NT 3.1, NT 3.5, NT 4.0 and Windows 2000 and Windows Home Server versions.

Microsoft Server OS

The Internet Protocol (IP) is the principal communications protocol in the Internet protocol suite for relaying datagrams across network boundaries, organized in abstraction layers, traditionally called "Link," "Internet," "Transport" and "Application”. Its routing function enables internetworking, and essentially establishes the Internet. IP defines packet structures that encapsulate the data to be delivered. It also defines addressing methods that are used to label the datagram with source and destination information.

Internet Protocols

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.