VPS Panel
Create DNS for domain to use as NS

Creating the A records

Login to WHM and look under DNS Functions.
Click Edit DNS Zone and select the primary domain (the one that appears in your welcome email).
Click the Edit button and wait for the page to load.
Check your New Account Info email for the correct name server IPs.
EXAMPLE:
ns1.resellerdomain.com -> 123.123.123.123
ns2.resellerdomain.com -> 50.50.50.78
(If you only have one IP, please contact HostGator via live chat, telephone or email to obtain both nameserver IP addresses.)
This is exactly the information you need for the record name and address. Almost done!
Back at WHM, scroll down to where you see “Add New Entries Below this Line”.
In the first blank below that line, type ns1
Skip the 14400, and in the drop down select “A”.
A new box will appear. Erase “IP or Hostname” and type your NS1 IP address. EXAMPLE: 123.123.123.123
In the second blank below that line, type ns2
Skip the 14400, and in the drop down select “A”.
A new box will appear. Erase “IP or Hostname” and type your NS2 IP address. EXAMPLE: 50.50.50.78
Scroll all the way down and click the Save button.