I wonder what the NS entry is used for. Is it just for informational use, or is there any functionality behind it? Assuming the following scenario:
DNS Server 1:
Zones: Company1.com, usual NS, SOA and A Records
DNS Server 2:
Zones: Company2.com, usual NS, SOA and A Records
NS contains name and IP of DNS.COmpany1.com
The objective is obviously that any clients querying DNS.Company2.com for a name xxxxx.company1.com get redirected to DNS.COmpany1.com. Set up a quick test installation, does not seem to work. So if this is not a proper use for an NS record, what then is it good for at all?