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Unique Local IPv6 Unicast Addresses (RFC4193)

IP.com Disclosure Number: IPCOM000129253D
Original Publication Date: 2005-Oct-01
Included in the Prior Art Database: 2005-Oct-04
Document File: 17 page(s) / 36K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

R. Hinden: AUTHOR [+2]

Abstract

This document defines an IPv6 unicast address format that is globally unique and is intended for local communications, usually inside of a site. These addresses are not expected to be routable on the global Internet.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 8% of the total text.

Network Working Group                                          R. Hinden
Request for Comments: 4193                                         Nokia
Category: Standards Track                                    B. Haberman
                                                                 JHU-APL
                                                            October 2005


                  Unique Local IPv6 Unicast Addresses

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 defines an IPv6 unicast address format that is globally
   unique and is intended for local communications, usually inside of a
   site.  These addresses are not expected to be routable on the global
   Internet.

Table of Contents

   1. Introduction ....................................................2
   2. Acknowledgements ................................................3
   3. Local IPv6 Unicast Addresses ....................................3
      3.1. Format .....................................................3
           3.1.1. Background ..........................................4
      3.2. Global ID ..................................................4
           3.2.1. Locally Assigned Global IDs .........................5
           3.2.2. Sample Code for Pseudo-Random Global ID Algorithm ...5
           3.2.3. Analysis of the Uniqueness of Global IDs ............6
      3.3. Scope Definition ...........................................6
   4. Operational Guidelines ..........................................7
      4.1. Routing ....................................................7
      4.2. Renumbering and Site Merging ...............................7
      4.3. Site Border Router and Firewall Packet Filtering ...........8
      4.4. DNS Issues .................................................8
      4.5. Application and Higher Level Protocol Issues ...............9
      4.6. Use of Local IPv6 Addresses for Local Communication ........9
      4.7. Use of Local IPv6 Addresses with VPNs .....................10

Hinden & Haberman           Standards Track                     [Page 1]
RFC 4193          Unique Local IPv6 Unicast Addresses       October 2005


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