The IPv6 Address-based DHCPv6 Unique Identifier (DUID-V6ADDR)
draft-templin-duid-ipv6-01

Document Type Active Internet-Draft (dhc WG)
Author Fred Templin 
Last updated 2021-01-26 (latest revision 2021-01-11)
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Network Working Group                                    F. Templin, Ed.
Internet-Draft                              Boeing Research & Technology
Intended status: Standards Track                        January 11, 2021
Expires: July 15, 2021

     The IPv6 Address-based DHCPv6 Unique Identifier (DUID-V6ADDR)
                       draft-templin-duid-ipv6-01

Abstract

   This document defines a new DHCPv6 Unique Identifier (DUID) type
   called DUID-V6ADDR that contains a single 128 bit IPv6 address.
   DUID-V6ADDR makes it possible for devices to use suitably-derived
   unique IPv6 addresses to identify themselves to DHCPv6 servers and/or
   other network nodes.

Status of This Memo

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   This Internet-Draft will expire on July 15, 2021.

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Templin                   Expires July 15, 2021                 [Page 1]
Internet-Draft                 DUID-V6ADDR                  January 2021

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Background  . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  DUID-V6ADDR Format  . . . . . . . . . . . . . . . . . . . . .   3
   5.  DUID-V6ADDR Uses  . . . . . . . . . . . . . . . . . . . . . .   4
   6.  Relation to Other DUID Types  . . . . . . . . . . . . . . . .   4
   7.  IPv6 Address Generation Method-Specific DUID Types  . . . . .   5
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   10. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   5
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     11.1.  Normative References . . . . . . . . . . . . . . . . . .   6
     11.2.  Informative References . . . . . . . . . . . . . . . . .   7
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   DHCP Unique Identifiers (DUIDs) are used in DHCPv6 control messages
   [RFC8415] to identify clients and servers (they may also be used in
   other protocol messages that import the format such as IPv6 Neighbor
   Discovery (IPv6 ND) [RFC4861]).  This document defines a new DUID
   type containing a single valid IPv6 address [RFC8200] that has been
   suitably derived through some means to ensure uniqueness.  The new
   DUID type is termed DUID-V6ADDR.

   Some methods of producing unique identifiers take care to ensure that
   the identifier is included in a well-formed IPv6 address.  For
   example, the Host Identity Tag (HIT) [RFC7401][I-D.ietf-drip-rid] is
   a valid IPv6 address and therefore occupies the same 128-bit space as
   for any IPv6 address (in network byte order).  Other IPv6 address
   generation methods [RFC7721] also assert uniqueness.  The only
   distinction needed within the DUID space is therefore a new DUID type
   value indicating the presence of a single IPv6 address.

   DUID-V6ADDR allows devices to use suitably-derived IPv6 addresses to
   identify themselves to DHCPv6 servers and vice versa.  The DUID-
   V6ADDR format makes no statement about the method used for generating
   the IPv6 address, but its use in control messages asserts that the
   address has been ensured unique through some unspecified means.
   Valid IPv6 address types include any unicast/anycast Global Unicast
   (GUA), Link-Local (LLA) or Unique-Local (ULA) address, with the
   specific address type identified by the subnet prefix per the IPv6
   addressing architecture [RFC4193][RFC4291].  The following sections
   present the DUID-V6ADDR format and type designation.
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