Domain Name System (DNS) IANA Considerations
RFC 6895
Document | Type |
RFC - Best Current Practice
(April 2013; No errata)
Obsoletes RFC 6195
|
|
---|---|---|---|
Author | Donald Eastlake | ||
Last updated | 2015-10-14 | ||
Replaces | draft-eastlake-dnsext-6195bis | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | WG Document | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 6895 (Best Current Practice) | |
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Ralph Droms | ||
IESG note | Olafur Gudmundsson (ogud@ogud.com) is the document shepherd. | ||
Send notices to | (None) |
Internet Engineering Task Force (IETF) D. Eastlake 3rd Request for Comments: 6895 Huawei BCP: 42 April 2013 Obsoletes: 6195 Updates: 1183, 2845, 2930, 3597 Category: Best Current Practice ISSN: 2070-1721 Domain Name System (DNS) IANA Considerations Abstract This document specifies Internet Assigned Numbers 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 and updates RFCs 1183, 2845, 2930, and 3597. Status of This Memo This memo documents an Internet Best Current Practice. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on BCPs is available in Section 2 of RFC 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc6895. Copyright Notice Copyright (c) 2013 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Eastlake Best Current Practice [Page 1] RFC 6895 DNS IANA Considerations April 2013 Table of Contents 1. Introduction ....................................................2 1.1. Terminology ................................................3 2. DNS Query/Response Headers ......................................3 2.1. One Spare Bit? .............................................4 2.2. OpCode Assignment ..........................................4 2.3. RCODE Assignment ...........................................4 3. DNS Resource Records ............................................6 3.1. RRTYPE IANA Considerations .................................7 3.1.1. DNS RRTYPE Allocation Policy ........................8 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 Acknowledgements ..................................................19 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 subtype registry. IANA currently maintains a web page of DNS parameters available fromShow full document text