Moving A6 to Historic Status
RFC 6563
Document | Type |
RFC - Informational
(March 2012; No errata)
Was draft-jiang-a6-to-historic (individual in int area)
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Authors | Sheng Jiang , David Conrad , Brian Carpenter | ||
Last updated | 2015-10-14 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 6563 (Informational) | |
Action Holders |
(None)
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Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Ralph Droms | ||
IESG note | Ralph Droms (rdroms@cisco.com) is the document shepherd. | ||
Send notices to | rdroms@cisco.com |
Internet Engineering Task Force (IETF) S. Jiang Request for Comments: 6563 Huawei Technologies Co., Ltd Category: Informational D. Conrad ISSN: 2070-1721 Cloudflare, Inc. B. Carpenter Univ. of Auckland March 2012 Moving A6 to Historic Status Abstract This document provides a summary of issues related to the use of A6 records, discusses the current status, and moves RFC 2874 to Historic status, providing clarity to implementers and operators. Status of This Memo This document is not an Internet Standards Track specification; it is published for informational purposes. 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). Not all documents approved by the IESG are a candidate for any level of Internet Standard; see 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/rfc6563. Copyright Notice Copyright (c) 2012 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. Jiang, et al. Informational [Page 1] RFC 6563 Moving A6 to Historic Status March 2012 Table of Contents 1. Introduction and Background .....................................2 1.1. Standards Action Taken .....................................3 2. A6 Issues .......................................................3 2.1. Resolution Latency .........................................3 2.2. Resolution Failure .........................................3 2.3. Cross Administrative Domains ...............................4 2.4. Difficult Maintenance ......................................4 2.5. Existence of Multiple RR Types for One Purpose is Harmful ..4 2.6. Higher Security Risks ......................................4 3. Current Usage of A6 .............................................5 3.1. Reasons for Current A6 Usage ...............................5 4. Moving A6 to Historic Status ....................................6 4.1. Impact on Current A6 Usage .................................6 4.2. Transition Phase for Current A6 Usage ......................6 5. Security Considerations .........................................6 6. IANA Considerations .............................................6 7. Acknowledgments .................................................6 8. References ......................................................7 8.1. Normative References .......................................7 8.2. Informative References .....................................7 1. Introduction and Background The IETF began standardizing two different DNS protocol enhancements for IPv6 addresses in DNS records: AAAA was specified in 1995 as a Proposed Standard [RFC1886] and later in 2003 as a Draft Standard [RFC3596], and A6 appeared in 2000 as a Proposed Standard [RFC2874]. The existence of multiple ways to represent an IPv6 address in the DNS has led to confusion and conflicts about which of these protocol enhancements should be implemented and/or deployed. Having more than one choice of how IPv6 addresses are to be represented within the DNS can be argued to have led to delays in the deployment of IPv6. In 2002, "Representing Internet Protocol version 6 (IPv6) Addresses in the Domain Name System (DNS)" [RFC3363] moved A6 to Experimental status, with an aim of clearing up any confusion in this area. [RFC3363] and [RFC3364] compared AAAA and A6, and examined many of the issues in the A6 standard; these issues are summarized in this document. After ten years, the Experimental status of A6 continues to result in confusion and parallel deployment of both A6 and AAAA, albeit AAAA predominates by a large degree. In recent IPv6 transition tests andShow full document text