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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