How to delegate a domain to another Name Server in Bind?

How to delegate a domain to another Name Server in Bind?

1. Edit the parent domain DNS file.
2. Remove the A record if any.
3. Declare the domain and NS records.

$ORIGIN in.example.com.
$TTL 600        ; 10 minutes
@                       NS      ns1.p17.dynect.net.
@                       NS      ns2.p17.dynect.net.
@                       NS      ns3.p17.dynect.net.
@                       NS      ns4.p17.dynect.net.

4. Save and exit Files.
5. Check the zone file for configuraion errors.
named-checkzone example.com example.com.dns

6. Reload the named service.
service named reload

7. Check if the changes are reflected or not.

[root@dnsserver ~]# dig in.example.com


;; QUESTION SECTION:
;in.example.com.               IN      A

;; ANSWER SECTION:
in.example.com.        900     IN      A       104.108.15.16

;; AUTHORITY SECTION:
in.example.com.        600     IN      NS      ns4.p17.dynect.net.
in.example.com.        600     IN      NS      ns1.p17.dynect.net.
in.example.com.        600     IN      NS      ns2.p17.dynect.net.
in.example.com.        600     IN      NS      ns3.p17.dynect.net.