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Generic Packet Tunneling in IPv6 Specification (RFC2473)

IP.com Disclosure Number: IPCOM000003053D
Original Publication Date: 1998-Dec-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 29 page(s) / 72K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

A. Conta: AUTHOR [+2]

Abstract

This document defines the model and generic mechanisms for IPv6 encapsulation of Internet packets, such as IPv6 and IPv4. The model and mechanisms can be applied to other protocol packets as well, such as AppleTalk, IPX, CLNP, or others.

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 4% of the total text.

Network Working Group A. Conta

Request for Comments: 2473 Lucent Technologies Inc.

Category: Standards Track S. Deering

Cisco Systems

December 1998

Generic Packet Tunneling in IPv6

Specification

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 defines the model and generic mechanisms for IPv6

encapsulation of Internet packets, such as IPv6 and IPv4. The model

and mechanisms can be applied to other protocol packets as well, such

as AppleTalk, IPX, CLNP, or others.

Table of Contents

1. Introduction..................................................2

2. Terminology...................................................2

3. IPv6 Tunneling................................................4

3.1 IPv6 Encapsulation.......................................6

3.2 IPv6 Packet Processing in Tunnels........................7

3.3 IPv6 Decapsulation.......................................7

3.4 IPv6 Tunnel Protocol Engine..............................8

4. Nested Encapsulation.........................................11

4.1 Limiting Nested Encapsulation..........................12

4.1.1 Tunnel Encapsulation Limit Option................13

4.1.2 Loopback Encapsulation...........................15

4.1.3 Routing Loop Nested Encapsulation................15

5. Tunnel IPv6 Header...........................................16

5.1 Tunnel IPv6 Extension Headers...........................17

6. IPv6 Tunnel State Variables..................................19

6.1 IPv6 Tunnel Entry-Point Node............................19

6.2 IPv6 Tunnel Exit-Point Node.............................19

6.3 IPv6 Tunnel Hop Limit...................................19

6.4 IPv6 Tunnel Packet Traffic Class........................20

6.5 IPv6 Tunnel Flow Label..................................20

6.6 IPv6 Tunnel Encapsulation Limit.........................20

6.7 IPv6 Tunnel MTU.........................................20

7. IPv6 Tunnel Packet Size Issues...............................21

7.1 IPv6 Tunnel Packet Fragmentation........................21

7.2 IPv4 Tunnel Packet Fragmentation........................22

8. IPv6 Tunnel Error Reporting and Processing...................22

8.1 Tunnel ICMP Messages.......