On 19/08/14 13:12, Bazy V wrote:
$ORIGIN 20.172.IN-ADDR.ARPA.

0.220/24       NS ns2.sub.test.com

On 19.08.14 13:37, Phil Mayers wrote:
You don't need to do this. You just need:

$ORIGIN 20.172.IN-ADDR.ARPA.
220     NS ns2.sub.test.com.

RFC 2317 is only need for /25 and longer.

... and it exactly causes the problem.

if ns2.sub.test.com contains 220.20.172.IN-ADDR.ARPA, resolution should
work the usual way.

Delegating 220/24.20.172.IN-ADDR.ARPA. to ns2.sub.test.com, you'd have to
create CNAMEs for 0.220/24 to 255.220/24, whic would be an overkill.

Note that either 0.220/24 wasn't technically correct, it should be:

220/24  NS      ns2.sub.test.com.
0.220   CNAME   0.220/24

but that's an overkill as Phil correctly pointed out.

--
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