>> Um, why?
> Firstly he does NOT have authority for the /16 reverse. Lots
> of latent problems there.
Nor is he claiming it. Nowhere on the internet is there anything saying
that the entire /16 should be looked up against his nameserver. No=20
should exist pointing to his nameserver as authoritative for the /16.
The convenience of having a zone file that is based on a /16 that he owns
part of does not create authority out of thin air, nor does it make any
meaningful claim to authority except to a system which (mistakenly) =
to use those nameservers as resolvers. Yes, if you are going to do this, =
is a prerequisite that your nameserver _NOT_ be anyone's resolver.
> Secondly sideways delegations don't work.
Huh? I'm not sure what you mean by "sideways delegations". It is
perfectly acceptable, for example, for:
a.root-servers.net returns 16.172.in-addr.arpa. IN NS ns1.arin.net.
ns1.arin.net returns 124.16.172.in-addr.apra. IN NS ns1.foobar.com.
ns1.foobar.com. returns 124.16.172.in-addr.arpa. IN NS ns1.subsidiary.com.
ns1.subsidiary.com. returns 184.108.40.206.in-addr.arpa. IN PTR=20
Actually it isn't. Nameservers can and do detect this as it
looks like a classic lame delegation. It also a sideways
delgation, the zone depth didn't impove between ns1.foobar.com
This does work. This is what is being proposed.
> Thirdly I'm sick and tired of having to debug stupid
> schemes ISP's come up with to try to avoid SWIPing the
> nameservers in situations like this. They don't work
> or they don't meet the customers expectations (i.e.
> they have a /24 and should just be able to use x.y.z.in-addr.arpa
> and have it work reliably).
So don't debug them. As long as ARIN has all of the /24s within the /19
pointing as NS records to the nameserver which contains the partially
populated /16 zone file (or which secondaries each of the relevant /24 =
from their true owners), things work just fine. Nothing really to debug.
Well when you have a bug report saying that your nameserver
doesn't work because someone tried to do a sideways delegation
you have to go in there and show what is broken.
This is not expected to work.