Hi all,

What is the best way to migrate DNS services to new IPs?

I have moved our hosting to a new address space. I must soon decomission the old DNS servers operating in the old address space. New DNS servers are already up and running. We host hundreds of domain names which now rely on the old DNS servers. To swap over, should I:

A.) Move the old DNS server names (ns1.mydomain.com, ns2.mydomain.com) to the new DNS servers and expect the registrars to figure out the change, or:

B.) Create new DNS server names (ns3.mydomain.com, ns4.mydomain.com) for the new DNS servers and ask everyone to manually update their domains at their registrars?

C.) Other options?

I don't know if option A is technically feasible. I suppose I would modify the A record for 'ns1.mydomain.com' on the old DNS servers to point to the new DNS server and expect this change to propogate to the root servers/registrars? Option B would certainly be a nuisance to our customers.

Any advice is greatly appreciated.