Resource Records for EUI-48 and EUI-64 Addresses in the DNS
RFC 7043

Document Type RFC - Informational (October 2013; No errata)
Last updated 2013-10-23
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IESG IESG state RFC 7043 (Informational)
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IESG note Joe requested that I look at ad sponsoring this and it looks like a candidate for that path.

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Internet Engineering Task Force (IETF)                          J. Abley
Request for Comments: 7043                                     Dyn, Inc.
Category: Informational                                     October 2013
ISSN: 2070-1721

      Resource Records for EUI-48 and EUI-64 Addresses in the DNS

Abstract

   48-bit Extended Unique Identifier (EUI-48) and 64-bit Extended Unique
   Identifier (EUI-64) are address formats specified by the IEEE for use
   in various layer-2 networks, e.g., Ethernet.

   This document describes two new DNS resource record types, EUI48 and
   EUI64, for encoding Ethernet addresses in the DNS.

   This document describes potentially severe privacy implications
   resulting from indiscriminate publication of link-layer addresses in
   the DNS.  EUI-48 or EUI-64 addresses SHOULD NOT be published in the
   public DNS.  This document specifies an interoperable encoding of
   these address types for use in private DNS namespaces, where the
   privacy concerns can be constrained and mitigated.

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/rfc7043.

Abley                         Informational                     [Page 1]
RFC 7043           Resource Records for EUI-48, EUI-64      October 2013

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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  The EUI48 Resource Record . . . . . . . . . . . . . . . . . .   3
     3.1.  EUI48 RDATA Wire Format . . . . . . . . . . . . . . . . .   4
     3.2.  EUI48 RR Presentation Format  . . . . . . . . . . . . . .   4
     3.3.  Example . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  The EUI64 Resource Record . . . . . . . . . . . . . . . . . .   4
     4.1.  EUI64 RDATA Wire Format . . . . . . . . . . . . . . . . .   4
     4.2.  EUI64 RR Presentation Format  . . . . . . . . . . . . . .   5
     4.3.  Example . . . . . . . . . . . . . . . . . . . . . . . . .   5
   5.  Example Use Case: IP Address Tracking in DOCSIS Networks  . .   5
   6.  DNS Protocol Considerations . . . . . . . . . . . . . . . . .   6
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   7
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     10.1.  Normative References . . . . . . . . . . . . . . . . . .   7
     10.2.  Informative References . . . . . . . . . . . . . . . . .   8

Abley                         Informational                     [Page 2]
RFC 7043           Resource Records for EUI-48, EUI-64      October 2013

1.  Introduction

   The Domain Name System (DNS) is described in [RFC1034] and [RFC1035].
   This base specification defines many resource record (RR) types, and
   subsequent specifications have defined others.  Each defined RR type
   provides a means of encoding particular data in the DNS.

   48-bit Extended Unique Identifier (EUI-48) [EUI48] and 64-bit
   Extended Unique Identifier (EUI-64) [EUI64] are address formats
   specified by the IEEE for use in various layer-2 networks, e.g.,
   Ethernet.

   This document defines two new RR types, EUI48 and EUI64, for encoding
   EUI-48 and EUI-64 addresses in the DNS.

   There are potentially severe privacy implications resulting from the
   indiscriminate publication of link-layer addresses in the DNS (see
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