Q:

How to setup sub-domains for a new IP?

Currently I have a domain example.org and one sub-domain peter.example.org hosting on one IP:
example.org

@        A       111.111.111.111
peter    CNAME   @

If I am going to add two sub-domain paul.example.org and mary.example.org for a new IP 222.222.222.222, is it correct to set up as:
example.org

@        A       111.111.111.111
peter    CNAME   @
paul     A       222.222.222.222
mary     A       222.222.222.222

A:

Yes, this is OK.
Depending on your needs, you can setup paul or mary as a CNAME of the other.

