Delegation of already loading zones?

[Todd Snyder]

Good day,

Looking through configuration of one of my servers (ns01.local), I have
example.com loading, and test.example.com loading.

In example.com, someone has delegated test.example.com back to the
server:

test.example.com		IN	NS	ns01.local

Since I am loading test.example.com specifically, that delegation
appears redundant.  Are there cases where that delegation is required?
Is there a standard that says I should do that for all zones I'm loading
that are subzones of another zone I'm loading?  Is this just an oddball
configuration that should be cleaned up?

Thanks,

Todd.


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