RFC 3484 (rfc3484) - Page 1 of 24


Default Address Selection for Internet Protocol version 6 (IPv6)



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Network Working Group                                          R. Draves
Request for Comments: 3484                            Microsoft Research
Category: Standards Track                                  February 2003


   Default Address Selection for Internet Protocol 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 (2003).  All Rights Reserved.

Abstract

   This document describes two algorithms, for source address selection
   and for destination address selection.  The algorithms specify
   default behavior for all Internet Protocol version 6 (IPv6)
   implementations.  They do not override choices made by applications
   or upper-layer protocols, nor do they preclude the development of
   more advanced mechanisms for address selection.  The two algorithms
   share a common context, including an optional mechanism for allowing
   administrators to provide policy that can override the default
   behavior.  In dual stack implementations, the destination address
   selection algorithm can consider both IPv4 and IPv6 addresses -
   depending on the available source addresses, the algorithm might
   prefer IPv6 addresses over IPv4 addresses, or vice-versa.

   All IPv6 nodes, including both hosts and routers, must implement
   default address selection as defined in this specification.















Draves                      Standards Track


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