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Basic Transition Mechanisms for IPv6 Hosts and Routers (RFC4213)

IP.com Disclosure Number: IPCOM000130117D
Original Publication Date: 2005-Oct-01
Included in the Prior Art Database: 2005-Oct-12
Document File: 28 page(s) / 59K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

E. Nordmark: AUTHOR [+2]

Abstract

This document specifies IPv4 compatibility mechanisms that can be implemented by IPv6 hosts and routers. Two mechanisms are specified, dual stack and configured tunneling. Dual stack implies providing complete implementations of both versions of the Internet Protocol (IPv4 and IPv6), and configured tunneling provides a means to carry IPv6 packets over unmodified IPv4 routing infrastructures.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 5% of the total text.

Network Working Group                                        E. Nordmark
Request for Comments: 4213                        Sun Microsystems, Inc.
Obsoletes: 2893                                              R. Gilligan
Category: Standards Track                                 Intransa, Inc.
                                                            October 2005


         Basic Transition Mechanisms for IPv6 Hosts and Routers

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 (2005).

Abstract

   This document specifies IPv4 compatibility mechanisms that can be
   implemented by IPv6 hosts and routers.  Two mechanisms are specified,
   dual stack and configured tunneling.  Dual stack implies providing
   complete implementations of both versions of the Internet Protocol
   (IPv4 and IPv6), and configured tunneling provides a means to carry
   IPv6 packets over unmodified IPv4 routing infrastructures.

   This document obsoletes RFC 2893.


Nordmark & Gilligan         Standards Track                     [Page 1]
RFC 4213            Basic IPv6 Transition Mechanisms        October 2005


Table of Contents

   1. Introduction ....................................................2
      1.1. Terminology ................................................3
   2. Dual IP Layer Operation .........................................4
      2.1. Address Configuration ......................................5
      2.2. DNS ........................................................5
   3. Configured Tunneling Mechanisms .................................6
      3.1. Encapsulation ..............................................7
      3.2. Tunnel MTU and Fragmentation ...............................8
           3.2.1. Static Tunnel MTU ...................................9
           3.2.2. Dynamic Tunnel MTU ..................................9
      3.3. Hop Limit .................................................11
      3.4. Handling ICMPv4 Errors ....................................11
      3.5. IPv4 Header Construction ..................................13
      3.6. Decapsulation .............................................14
      3.7. Link-Local Addresses ......................................17
      3.8. Neighbor Discovery over Tunnels ........