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Dynamic Host Configuration Protocol for IPv6 (DHCPv6)
RFC 3315

Network Working Group                                      R. Droms, Ed.
Request for Comments: 3315                                         Cisco
Category: Standards Track                                       J. Bound
                                                         Hewlett Packard
                                                                 B. Volz
                                                                Ericsson
                                                                T. Lemon
                                                                 Nominum
                                                              C. Perkins
                                                   Nokia Research Center
                                                               M. Carney
                                                        Sun Microsystems
                                                               July 2003

         Dynamic Host Configuration Protocol for IPv6 (DHCPv6)

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2003).  All Rights Reserved.

Abstract

   The Dynamic Host Configuration Protocol for IPv6 (DHCP) enables DHCP
   servers to pass configuration parameters such as IPv6 network
   addresses to IPv6 nodes.  It offers the capability of automatic
   allocation of reusable network addresses and additional configuration
   flexibility.  This protocol is a stateful counterpart to "IPv6
   Stateless Address Autoconfiguration" (RFC 2462), and can be used
   separately or concurrently with the latter to obtain configuration
   parameters.

Droms, et al.               Standards Track                     [Page 1]
RFC 3315                     DHCP for IPv6                     July 2003

Table of Contents

   1.  Introduction and Overview . . . . . . . . . . . . . . . . . .   5
       1.1.   Protocols and Addressing . . . . . . . . . . . . . . .   6
       1.2.   Client-server Exchanges Involving Two Messages . . . .   6
       1.3.   Client-server Exchanges Involving Four Messages. . . .   7
   2.  Requirements. . . . . . . . . . . . . . . . . . . . . . . . .   7
   3.  Background. . . . . . . . . . . . . . . . . . . . . . . . . .   8
   4.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   8
       4.1.   IPv6 Terminology . . . . . . . . . . . . . . . . . . .   9
       4.2.   DHCP Terminology . . . . . . . . . . . . . . . . . . .  10
   5.  DHCP Constants. . . . . . . . . . . . . . . . . . . . . . . .  12
       5.1.   Multicast Addresses. . . . . . . . . . . . . . . . . .  13
       5.2.   UDP Ports. . . . . . . . . . . . . . . . . . . . . . .  13
       5.3.   DHCP Message Types . . . . . . . . . . . . . . . . . .  13
       5.4.   Status Codes . . . . . . . . . . . . . . . . . . . . .  15
       5.5.   Transmission and Retransmission Parameters . . . . . .  16
       5.6    Representation of time values and "Infinity" as a time
              value. . . . . . . . . . . . . . . . . . . . . . . . .  16
   6.  Client/Server Message Formats . . . . . . . . . . . . . . . .  16
   7.  Relay Agent/Server Message Formats. . . . . . . . . . . . . .  17
       7.1.   Relay-forward Message. . . . . . . . . . . . . . . . .  18
       7.2.   Relay-reply Message. . . . . . . . . . . . . . . . . .  19
   8.  Representation and Use of Domain Names. . . . . . . . . . . .  19
   9.  DHCP Unique Identifier (DUID) . . . . . . . . . . . . . . . .  19
       9.1.   DUID Contents. . . . . . . . . . . . . . . . . . . . .  20
       9.2.   DUID Based on Link-layer Address Plus Time [DUID-LLT].  20
       9.3.   DUID Assigned by Vendor Based on Enterprise Number
              [DUID-EN]. . . . . . . . . . . . . . . . . . . . . . .  22
       9.4.   DUID Based on Link-layer Address [DUID-LL] . . . . . .  22
   10. Identity Association. . . . . . . . . . . . . . . . . . . . .  23
   11. Selecting Addresses for Assignment to an IA . . . . . . . . .  24
   12. Management of Temporary Addresses . . . . . . . . . . . . . .  25
   13. Transmission of Messages by a Client. . . . . . . . . . . . .  25
   14. Reliability of Client Initiated Message Exchanges . . . . . .  26
   15. Message Validation. . . . . . . . . . . . . . . . . . . . . .  27
       15.1.  Use of Transaction IDs . . . . . . . . . . . . . . . .  28
       15.2.  Solicit Message. . . . . . . . . . . . . . . . . . . .  28
       15.3.  Advertise Message. . . . . . . . . . . . . . . . . . .  28

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