Re: [DNSOP] [internet-drafts@ietf.org: New Version Notification for draft-sullivan-dns-class-useless-01.txt]

In message <20160316235134.GI1994@mx2.yitter.info>, Andrew Sullivan writes:
> On Wed, Mar 16, 2016 at 10:53:57PM -0000, John Levine wrote:
> > >Since 1034 says that A in CH is "a domain name followed by a 16 bit
> > >octal Chaos address," but 882 sais "it might have the phone number of
> > >the host" (and gives the example
> > >
> > >       +----------+--------+--------+----------------------------+
> > >       |F.ISI.ARPA|   A    |   CS   |         213-822-2112       |
> > >       +----------+--------+--------+----------------------------+
> > 
> > Not to niggle on details, but that's CS as in CSNET, not CH as in
> > Chaos, and the phone number was the number of the host's dialup modem.
> 
> I'm apparently having a hard time reading this month :-/ But your
> point makes the problem yet worse, since there's no sense that in the
> CS net class here the RDATA of an A record is a host address.  I
> suppose that, since it's in 882 (which is obsoleted) that doesn't
> matter.  But in CH according to the definition it's not just a host
> addressm but "a domain name followed by a 16 bit" address.  (Maybe
> that actually means that the domain name is not in the RDATA.  Since
> I'm having so much trouble reading this month, it's probably better
> that I not form an opinion.)

RFC 1034 has:

  Similarly we might see:

      XX.LCS.MIT.EDU. IN      A       10.0.0.44
                      CH      A       MIT.EDU. 2420

Which breaks the rule of a zone being all of one class as the owner
name here is clearly inherited.

A may have been better subtyped but that is water under the bridge now.

      XX.LCS.MIT.EDU. IN      A       IN 10.0.0.44
                      IN      A       CH MIT.EDU. 2420
                      IN      A       IN6 2001:0DB8::2c

Mark

> Thanks for the correction.
> 
> A
> 
> -- 
> Andrew Sullivan
> ajs@anvilwalrusden.com
> 
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Mark Andrews, ISC
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PHONE: +61 2 9871 4742                 INTERNET: marka@isc.org