Deprecating obsolete DNS Resource Records Types
draft-sury-deprecate-obsolete-resource-records-01

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dnsop                                                            O. Sury
Internet-Draft                                                   E. Hunt
Updates: 1035,3597,4035 (if approved)        Internet Systems Consortium
Intended status: Standards Track                            May 13, 2019
Expires: November 14, 2019

            Deprecating obsolete DNS Resource Records Types
           draft-sury-deprecate-obsolete-resource-records-01

Abstract

   This document deprecates Resource Records (RR) Types that are either
   not being used for anything meaningful or were been already made
   obsolete by other RFCs.  This document updates [RFC1035], [RFC1035],
   [RFC4034].

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on November 14, 2019.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Deprecating MD, MF, MB, MG, MR, MINFO, MAILA, and MAILBRR
       Types . . . . . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   2
   4.  Implementation Considerations . . . . . . . . . . . . . . . .   3
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   3
   6.  Operational Considerations  . . . . . . . . . . . . . . . . .   4
   7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   4
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   4
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   4
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   4
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   4

1.  Introduction

   [RFC1035] and other documents have defined some Resource Record (RR)
   Types that are no longer in common use, some of which have been
   rendered obsolete by subsequent standards, but have never been
   clearly deprecated in the context of the DNS.  In some cases there
   have been interoperability problems between DNS implementations that
   support these types and those that do not - for example, because of
   DNS name compression in the wire format.  Continued support for these
   RR Types imposes a complexity cost on new implementations for little
   benefit.

   This document formally deprecates such RR Types, allowing
   implementations to drop specific support for them.

2.  Deprecating MD, MF, MB, MG, MR, MINFO, MAILA, and MAILBRR Types

   The MD, MF, MB, MG, MR, MINFO, MAILA, and MAILB RR Types aren't used
   in any existing standards, and this documents deprecates their usage.
   The MD, MF, MB, MG, MR, and MINFO RR Types RDATA contain a domain
   name that could be compressed in the RDATA section.

   As an update to [RFC3597] and [RFC4034] this document specifies that
   for MD, MF, MB, MG, MR, and MINFO RR types, the canonical form is
   such that no downcasing of embedded domain names takes place, and is
   otherwise identical to the canonical form specified in [RFC4034]
   section 6.2.

3.  IANA Considerations

   This documents updates the IANA registry "Domain Name System (DNS)
   Parameters" ([DNS-IANA]).

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              +-------+-------+------------+---------------+
              | TYPE  | Value | Meaning    | Reference     |
              +-------+-------+------------+---------------+
              | MD    | 3     | DEPRECATED | This document |
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