Browse Prior Art Database

A Flexible Method for Managing the Assignment of Bits of an IPv6 Address Block (RFC3531)

IP.com Disclosure Number: IPCOM000012312D
Original Publication Date: 2003-Apr-01
Included in the Prior Art Database: 2005-May-20
Document File: 8 page(s) / 11K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

M. Blanchet: AUTHOR

Abstract

This document proposes a method to manage the assignment of bits of an IPv6 address block or range. When an organisation needs to make an address plan for its subnets or when an ISP needs to make an address plan for its customers, this method enables the organisation to postpone the final decision on the number of bits to partition in the address space they have. It does it by keeping the bits around the borders of the partition to be free as long as possible. This scheme is applicable to any bits addressing scheme using bits with partitions in the space, but its first intended use is for IPv6. It is a generalization of RFC 1219 and can be used for IPv6 assignments.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 24% of the total text.

Network Working Group                                        M. Blanchet
Request for Comments: 3531                                      Viagenie
Category:Informational                                        April 2003


         A Flexible Method for Managing the Assignment of Bits
                        of an IPv6 Address Block

Status of this Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2003).  All Rights Reserved.

Abstract

   This document proposes a method to manage the assignment of bits of
   an IPv6 address block or range.  When an organisation needs to make
   an address plan for its subnets or when an ISP needs to make an
   address plan for its customers, this method enables the organisation
   to postpone the final decision on the number of bits to partition in
   the address space they have.  It does it by keeping the bits around
   the borders of the partition to be free as long as possible.  This
   scheme is applicable to any bits addressing scheme using bits with
   partitions in the space, but its first intended use is for IPv6.  It
   is a generalization of RFC 1219 and can be used for IPv6 assignments.

Table of Contents

   1.  Rationale  . . . . . . . . . . . . . . . . . . . . . . . . . .  2
   2.  Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2
   3.  Description of the Algorithm . . . . . . . . . . . . . . . . .  3
     3.1 Leftmost . . . . . . . . . . . . . . . . . . . . . . . . . .  3
     3.2 Rightmost  . . . . . . . . . . . . . . . . . . . . . . . . .  3
     3.3 Centermost . . . . . . . . . . . . . . . . . . . . . . . . .  4
   4.  Example  . . . . . . . . . . . . . . . . . . . . . . . . . . .  4
   5.  Security Considerations  . . . . . . . . . . . . . . . . . . .  5
   6.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . .  5
       References . . . . . . . . . . . . . . . . . . . . . . . . . .  6
       Author's Address . . . . . . . . . . . . . . . . . . . . . . .  6
       Full Copyright Statement . . . . . . . . . . . . . . . . . . .  7


Blanchet                     Informational                      [Page 1]
RFC 3531        Bits Assignment of an IPv6 Address Block      April 2003


1. Rationale

   IPv6 addresses have a flexible structure for address assignments.
   This enables registries, internet service providers, network
   designers and others to assign address ranges to organizations and
   networks based on different criteria, like size of networks,
   estimated growth rate, etc.  Often, the initia...