Internet Registry IP Allocation Guidelines
RFC 2050

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• 04

Network Working Group                                      K. Hubbard
Request for Comments: 2050                                 M. Kosters
Obsoletes: 1466                                              InterNIC
BCP: 12                                                     D. Conrad
Category: Best Current Practice                                 APNIC
                                                        D. Karrenberg
                                                                 RIPE
                                                            J. Postel
                                                                  ISI
                                                        November 1996

               INTERNET REGISTRY IP ALLOCATION GUIDELINES

Status of this Memo

   This document specifies an Internet Best Current Practices for the
   Internet Community, and requests discussion and suggestions for
   improvements.  Distribution of this memo is unlimited.

IESG Note:

   By approving this document as a Best Current Practice,the IESG
   asserts its belief that this policy described herein is an accurate
   representation of the current practice of the IP address registries
   with respect to address assignment.  This does not constitute
   endorsement or recommendation of this policy by the IESG. The IESG
   will reevaluate its approval of this document in December 1997 taking
   into consideration the results of the discussions that will be take
   place in the IRE Working Group between now and then.

Abstract

   This document describes the registry system for the distribution of
   globally unique Internet address space and registry operations.
   Particularly this document describes the rules and guidelines
   governing the distribution of this address space.

   This document describes the IP assignment policies currently used by
   the Regional Registries to implement the guidelines developed by the
   IANA. The guidelines and these policies are subject to revision at
   the direction of the IANA. The registry working group (IRE WG) will
   be discussing these issues and may provide advice to the IANA about
   possible revisions.

   This document replaces RFC 1466, with all the guidelines and
   procedures updated and modified in the light of experience.

Hubbard, et. al.         Best Current Practice                  [Page 1]
RFC 2050       Internet Registry IP Allocation Guidelines  November 1996

   This document does not describe private Internet address space and
   multicast address space.  It also does not describe regional and
   local refinements of the global rules and guidelines.

   This document can be considered the base set of operational
   guidelines in use by all registries.  Additional guidelines may be
   imposed by a particular registry as appropriate.

Table of Contents

    1.  Introduction.......................................2
    2.  Allocation Framework...............................4
    2.1  Guidelines for Internet Service Providers.........4
    2.2  Submission of Reassignment Information............6
    3.   Assignment Framework..............................7
    3.1  Common Registry Requirements......................7
    3.2  Network Engineering Plans.........................8
    3.3  Previous Assignment History.......................9
    3.4  Network Deployment Plans..........................9
    3.5  Organization Information..........................9
    3.6  Expected Utilization Rate.........................10
    4.   Operational Guidelines for Registries.............10
    5.   In-Addr.Arpa Domain Maintenance...................11
    6.   Right to Appeal...................................11
    7.   References........................................12
    8.   Security Considerations...........................12
    9.   Authors' Addresses................................13

1. Introduction

   The addressing constraints described in this document are largely the
   result of the interaction of existing router technology, address
   assignment, and architectural history.  After extensive review and
   discussion, the authors of this document, the IETF working group that
   reviewed it and the IESG have concluded that there are no other
   currently deployable technologies available to overcome these
   limitations. In the event that routing or router technology develops
   to the point that adequate routing aggregation can be achieved by
   other means or that routers can deal with larger routing and more
   dynamic tables, it may be appropriate to review these constraints.

   Internet address space is distributed according to the following
   three goals:

   1) Conservation: Fair distribution of globally unique Internet address
   space according to the operational needs of the end-users and Internet
   Service Providers operating networks using this address space.
   Prevention of stockpiling in order to maximize the lifetime of the

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