Enter the Host Name of the Child Name Server you wish to add in the Host Name box, mention its IP Address (IPv4 or IPv6) and click the Save button.
Examples:
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For yourdomainname.com, you may use the Host Name as ns1.yourdomainname.com and an IPv4 IP Address as 111.222.333.444.
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yourdomainname.biz could have the Host Name as dns1.yourdomainname.biz and an IPv6 IP Address as 2001:0db8:0:0:0:0:1428:57ab.
Registering a Child Name Server as mentioned above is just the first step. The Child Name Server is required to be registered at the Registry to only serve as a non-authoritative Record should your Child Name Server not be resolvable in some extreme condition.
This Name Server would start working only after you have added either an Address (A) Record for IPv4 or AAAA Record for IPv6 or Canonical (CNAME) Record for this Name Server within the Zone for the domain name (of this Child Name Server) in your own DNS Server, thus binding the NS to the IP Address.
Examples:
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If you are running your own DNS Servers, then you would need to add a Zone for the domain name yourdomainname.com and create an A Record like:
ns1.yourdomainname.com. 38400 IN A 111.222.333.444
Similarly, you may add an AAAA Record as
ns1.yourdomainname.com. 38400 IN AAAA 2001:0db8:0:0:0:0:1428:57ab
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If you wish to simply point your Name Servers to other Name Servers, then you may do so by either:
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you may either add a CNAME Record to your Service Provider's Name Server, after enabling Managed DNS service through them:
ns1.yourdomainname.com. 38400 IN CNAME ns1.serviceprovider.com
or
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you may add an A or AAAA Record to your Service Provider's Name Server IP Address (depending upon whether your Service Provider has an IPv4 or IPv6), after enabling Managed DNS service through them:
ns1.yourdomainname.com. 38400 IN A 777.888.999.000
or
ns1.yourdomainname.com. 38400 IN AAAA 2001:0db8:0:0:0:0:1428:57ab
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