I currently share a server with a small group, but will be moving most of my accounts off onto a dedicated server in another datacenter.
Right now I have ns1.domain.com and ns2.domain.com registered with the old server. These are the name servers that my clients use with their domains.
On the new server I have complete control over everything. The new server is running WHM and Cpanel.
How should I set up name servers on the new server so that all I need to do is update the IP addresses of the nameservers with my registrar, and wait for propagation to occur? I can't assign IP addresses to ns1.domain.com and ns2.domain.com on the new server, because they already have IP addresses assigned to them - WHM errors out with the message:
"Sorry, the nameserver ns1.domain.com already has the ip x.x.x.x assigned to it."
My assumption is that I need to create nameservers on the new server before I can start adding domains, but I don't want to change the IP address of my nameservers with my registrar now because I don't want my clients' sites to start resolving to the new server until I'm completely ready.