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Neighbor Discovery for IP Version 6 (IPv6) (RFC2461)

IP.com Disclosure Number: IPCOM000003040D
Original Publication Date: 1998-Dec-01
Included in the Prior Art Database: 2019-Feb-11

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

T. Narten: AUTHOR [+2]

Related Documents

10.17487/RFC2461: DOI

Abstract

This document specifies the Neighbor Discovery protocol for IP Version 6. [STANDARDS-TRACK]

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 2% of the total text.

Network Working Group T. Narten Request for Comments: 2461 IBM Obsoletes: 1970 E. Nordmark Category: Standards Track Sun Microsystems W. Simpson Daydreamer December 1998

Neighbor Discovery for IP Version 6 (IPv6)

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 (1998). All Rights Reserved.

Abstract

This document specifies the Neighbor Discovery protocol for IP Version 6. IPv6 nodes on the same link use Neighbor Discovery to discover each other’s presence, to determine each other’s link-layer addresses, to find routers and to maintain reachability information about the paths to active neighbors.

Table of Contents

1. INTRODUCTION............................................. 3 2. TERMINOLOGY.............................................. 4 2.1. General............................................. 4 2.2. Link Types.......................................... 7 2.3. Addresses........................................... 8 2.4. Requirements........................................ 9 3. PROTOCOL OVERVIEW........................................ 9 3.1. Comparison with IPv4................................ 13 3.2. Supported Link Types................................ 15 4. MESSAGE FORMATS.......................................... 17 4.1. Router Solicitation Message Format.................. 17 4.2. Router Advertisement Message Format................. 18 4.3. Neighbor Solicitation Message Format................ 21 4.4. Neighbor Advertisement Message Format............... 23 4.5. Redirect Message Format............................. 26

Narten, et. al. Standards Track [Page 1]

RFC 2461 Neighbor Discovery for IPv6 December 1998

4.6. Option Formats...................................... 28 4.6.1. Source/Target Link-layer Address............... 28 4.6.2. Prefix Information............................. 29 4.6.3. Redirected Header.............................. 31 4.6.4. MTU............................................ 32 5. CONCEPTUAL MODEL OF A HOST............................... 33 5.1. Conceptual Data Structures.......................... 33 5.2. Conceptual Sending Algorithm........................ 35 5.3. Garbage Collection and Timeout Requirements......... 37 6. ROUTER AND PREFIX DISCOVERY.............................. 37 6.1. Message Validation.................................. 38 6.1.1. Validation of Router Solicitation Messages..... 38 6.1.2. Validation of Router Advertisement Messages.... 39 6.2. Router Specification................................ 40 6.2.1. Router Configuration Variables................. 40 6.2.2. Becoming An Advertising Interface.............. 44 6.2.3. Router Advertisement Message Content.......

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