Re: [DNSOP] Fwd: New Version Notification for draft-sury-deprecate-obsolete-resource-records-00.txt

Dick Franks <rwfranks@gmail.com> Fri, 23 March 2018 23:06 UTC

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From: Dick Franks <rwfranks@gmail.com>
Date: Fri, 23 Mar 2018 23:06:06 +0000
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Subject: Re: [DNSOP] Fwd: New Version Notification for draft-sury-deprecate-obsolete-resource-records-00.txt
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On 23 March 2018 at 12:11, Ondřej Surý <ondrej@isc.org>; wrote:

>
> this is a first attempt to start reducing the load on DNS Implementors and
> actually remove the stuff from DNS that’s not used and not needed anymore.
>


I have no quarrel with the overall effect of this proposal, but the
justifications are necessarily different for each category identified in
RFC1035.

          3.3.4. MD RDATA format (Obsolete)
          3.3.5. MF RDATA format (Obsolete)

These were already obsolete when RFC1035 was published and arguably should
never have appeared at all.
If these have not already been deprecated somewhere else, there is no
plausible argument against doing so now.


          3.3.3. MB RDATA format (EXPERIMENTAL)
          3.3.6. MG RDATA format (EXPERIMENTAL)
          3.3.7. MINFO RDATA format (EXPERIMENTAL)
          3.3.8. MR RDATA format (EXPERIMENTAL)

After 30 years, it seem clear that the "experiment" produced little or
nothing of lasting value.  Plenty of word have been wasted in the past
about open-ended experiments and unpublished results.  Deprecating these
RRTYPES would put a formal end to the "experiment".  Any counter-argument
needs to be justified by evidence of continuing use in the global internet,
and made by the parties directly affected.  The "someone might be using it
somewhere ..." argument is far from convincing.


          3.4.2. WKS RDATA format

WKS is IPv4-specific, so the choice is ether to wait until IPv4 itself
becomes deprecated, or to dispose of it now in the same manner as MB, MG
etc.


          3.2.3. QTYPE values

The intended meaning of MAILA is uncertain, but it is already declared by
RFC1035 to be obsolete.

MAILB is a specific request for MB, MG, and MR records.

Both should also be deprecated by this document.



--DIck

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