How to configure a sub-domain?

[Pete Ehlke]

* Nate Campi <nate at wired.com> said, on [011216 01:06]:
> 
> Well, I'm not saying this is correct, right, good, or in any way
> recommended, but if you keep the subdomain on the same host(s) as the
> parent zone, you can create a subdomain/subzone without NS records in
> the parent zone for the subdomain. You can create it in the BIND config
> file, it'll load and it's RR's will resolve just fine (assuming the
> zone/subdomain has the proper NS and SOA entries like any other zone).
> 
It'll only work if you're not running bind 9. v4 and v8 both
promote child NS records into the parent zone; v9 strictly
enforces zone boundaries. See the archives of bind9-users from just last
week for a textbook example of this happening, and how it bit one
sysadmin from a .edu

This is one of those technically incorrect practices that older binds
let people get away with, imnsho to their detriment. Don't do it.

--Pete