That should be done from your DNS panel. If you didn't change your domain nameservers from the registrar's ones, then most likely, it'll be in your registrar's panel somewhere.
Use an A record to point it to the needed IP.
Last edited by Wintereise; 03-25-2011 at 08:27 AM.
Reason: Typo'd, doh
The new IP is on another server. Please advise me what to do step by step.
You don't have to create a subdomain in this scenario.
Just add an A record for that subdomain in the zone file (use zone editor in WHM) of the main domain. And on the destination server create an account for that subdomain to accept connection (for apache) and serve content.