on a primary which is to have its own name servers (using lancastrian-it.co.uk as an example)
- set up the parent domain as ns1.lancastrian-it.co.uk and ns2.lancastrian-it.co.uk
- set up the child name servers as ns1.lancastrian-it.co.uk and ns2.lancastrian-it.co.uk but also inlcude the relevant ip address here
On a domain without name servers (using lancastrian-it.co.uk as an example)
- set up the parent name servers as ns1.lancastrian-it.co.uk and ns2.lancastrian-it.co.uk
- no child name servers.