Domain Name System (DNS) IANA Considerations
draft-ietf-dnsext-rfc6195bis-00

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Document Type Active Internet-Draft (dnsext WG)
Last updated 2012-03-27
Replaces draft-eastlake-dnsext-6195bis
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INTERNET-DRAFT                                           Donald Eastlake
Obsoletes: 6195                                                   Huawei
Updates: 1183, 3597
Intended status: Best Current Practice
Expires: September 26, 2012                               March 27, 2012

              Domain Name System (DNS) IANA Considerations
                 <draft-ietf-dnsext-rfc6195bis-00.txt>

Abstract

   This document specifies Internet Assigned Number Authority (IANA)
   parameter assignment considerations for the allocation of Domain Name
   System (DNS) resource record types, CLASSes, operation codes, error
   codes, DNS protocol message header bits, and AFSDB resource record
   subtypes.  It obsoletes RFC 6195.

Status of This Memo

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

   Distribution of this draft is unlimited. It is intended to become the
   new BCP 42 obsoleting RFC 6195. Comments should be sent to the DNS
   Extensions Working Group mailing list <dnsext@ietf.org>.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that
   other groups may also distribute working documents as Internet-
   Drafts.

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   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

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D. Eastlake 3rd                                                 [Page 1]
INTERNET-DRAFT                                   DNS IANA Considerations

Table of Contents

      1. Introduction............................................3
      1.1. Terminology...........................................3
      1.2 Acknowledgement........................................3

      2. DNS Query/Response Headers..............................4
      2.1. One Spare Bit?........................................4
      2.2. OpCode Assignment.....................................5
      2.3. RCODE Assignment......................................5

      3. DNS Resource Records....................................7
      3.1. RRTYPE IANA Considerations............................8
      3.1.1. DNS RRTYPE Allocation Policy........................9
      3.1.2. DNS RRTYPE Expert Guidelines.......................10
      3.1.3. Special Note on the OPT RR.........................10
      3.1.4. The AFSDB RR Subtype Field.........................10
      3.2. RR CLASS IANA Considerations.........................11
      3.3. Label Considerations.................................13
      3.3.1. Label Types........................................13
      3.3.2. Label Contents and Use.............................13

      4. Security Considerations................................14
      5. IANA Considerations....................................14

      Appendix A: RRTYPE Allocation Template....................15
      Appendix B: Changes From RFC 6195.........................16

      Normative References......................................17
      Informative References....................................18

D. Eastlake 3rd                                                 [Page 2]
INTERNET-DRAFT                                   DNS IANA Considerations

1. Introduction

   The Domain Name System (DNS) provides replicated distributed secure
   hierarchical databases that store "resource records" (RRs) under
   domain names. DNS data is structured into CLASSes and zones that can
   be independently maintained. Familiarity with [RFC1034], [RFC1035],
   [RFC2136], [RFC2181], and [RFC4033] is assumed.

   This document provides, either directly or by reference, the general
   IANA parameter assignment considerations that apply across DNS query
   and response headers and all RRs. There may be additional IANA
   considerations that apply to only a particular RRTYPE or
   query/response OpCode. See the specific RFC defining that RRTYPE or
   query/response OpCode for such considerations if they have been
   defined, except for AFSDB RR considerations [RFC1183], which are
   included herein. This RFC obsoletes [RFC6195]; however, the only
   significant changes are those to the RRTYPE IANA allocation process,
   aimed at streamlining it and clarifying the expected behavior of the
   parties involved, and the closing of the AFSDB sub-type registry.

   IANA currently maintains a web page of DNS parameters available from
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