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
[include full document text]
datatracker.ietf.org