RFC 3531 (rfc3531) - Page 1 of 7
A Flexible Method for Managing the Assignment of Bits of an IPv6 Address Block
Alternative Format: Original Text Document
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