[as112-ops] [Ext] Re: Request to add home.arpa to AS112 repertoire

[Kim Davies]

Hi Joe,

Quoting Joe Abley on Wednesday December 06, 2017:
> 
> The document as-written includes directions to the IANA that are
> challenging to implement well, since a new delegation to AS112
> nameservers is going to be lame at least from the perspective of some
> clients, due to the loose coordination of AS112 operators (the one not
> active on this list).
> 
> We have an approach ready (RFC 7534 deprecated 6304, and the
> nameservers are answering) and documented (RFC 7535) that should avoid
> lame delegations. Since there is no existing home.arpa traffic to break,
> this would be an ideal time to field test the mechanism in the wild
> and confirm what is expected, which is that the result is an effective
> AS112-style sink with no lame delegations.
> 
> The IANA team have my sympathies with this, since they have been
> directed to do something that is (a) going to break and (b) ignores
> the (I think) fairly expicit direction that has emerged from dnsop on
> this very topic.
>
> It would be nice to think the IETF could revisit this text, I think.
> It wouldn't take much change to the text to switch from lame delegations
> to DNAME redirection. I volunteer to generate sentences, if that helps.

We explored using DNAME for this particular delegation as part of the
review process. In discussion with the IAB, authors and others we came
to the conclusion that manually configuring delegations is the most
practical approach.

The reason for this is the .arpa zone is served by the root servers,
and thus to perform DNAME processing and publication for the first time
on the root servers we believe would necessarily require exceptional
outreach and planning prior. We are also exploring options for
potentially separating serving the .arpa zone from the services provided
by the root servers. However waiting to make any significant progress
in these areas will likely leave the home.arpa delegation waiting much
longer that folks would like.

kim