Hi,
I have a bit of a technical challenge. I want to replace an existing server with a new server, which means moving all clients to the new server along with making all the DNS changes.

My questions:

I want the same nameservers on the new server as the old server. To migrate them do you do the following:

1) Very first thing 24 hours before everything else - update all old server account dns zones TTL with something like 3600 (hourly update).
2) Simply setup the same nameservers on the New server (in WHM, although they have old server IP assigned to them still)
3) Move (copy with WHM) clients sites to new server.
4) Update all account zone files on old server to have new server IP put in them, so now new server will be serving the websites. But don't alter old server nameserver zone files.
5) Decide on 2 IP's on new server to assign to nameservers and enter these IPs into the Domain Registrar records.
6) Now go back to new server and manually update nameserver zone files to have the new IP's you decided on.

Will this process work? What about reverse DNS entries? I had the nameservers on the old server setup with reverse DNS entries for the old IP's - will this stuff everything up? Alternatively can you migrate the old server IP's and make the whole thing instant?

Many thanks in advance to whoever gives advice - it will be greatly appreciated.

Actually I've been told by support I can simply have the old server IP's re-routed to the New Server.

So how does this now work? To migrate all clients would I now do this:

1) I copy all client accounts to the new server from old server.
2) I make sure all client account zone files on new server have old server IP's in them still.
3) I need to have the old server nameservers setup on new server - so I just copy old nameserver zone files accross to new server.
4) I contact SM to re-route IP's

Anyone see any prob's with this?