Enterprise Renumbering: Experience and Information Solicitation
RFC 1916

Document Type RFC - Informational (February 1996; No errata)
Last updated 2013-03-02
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Network Working Group                                       H. Berkowitz
Request for Comments: 1916                             PSC International
Category: Informational                                      P. Ferguson
                                                     cisco Systems, Inc.
                                                               W. Leland
                                                                Bellcore
                                                               P. Nesser
                                              Nesser & Nesser Consulting
                                                           February 1996

    Enterprise Renumbering: Experience and Information Solicitation

Status of this Memo

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

Abstract

   Because of the urgent need for, and substantial difficulty in,
   renumbering IP networks, the PIER working group is compiling a series
   of documents to assist sites in their renumbering efforts.  The
   intent of these documents is to provide both educational and
   practical information to the Internet community. To this end the
   working group is soliciting information from organizations that
   already have gone through, or are in the process of going through,
   renumbering efforts. Case studies, tools, and lists of applications
   that require special attention are sought.

Table of Contents

   1.   Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
   2.   Renumbering Experience . . . . . . . . . . . . . . . . . . . 4
   3.   Information on Tools . . . . . . . . . . . . . . . . . . . . 5
   4.   Application Information  . . . . . . . . . . . . . . . . . . 6
   5.   Security Considerations  . . . . . . . . . . . . . . . . . . 6
   6.   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . 7
   A.   Formatting Rules (from RFC 1543) . . . . . . . . . . . . . . 8

Berkowitz, et al             Informational                      [Page 1]
RFC 1916          Enterprise Renumbering Solicitation      February 1996

1. Introduction

   There are immediate and increasingly severe requirements to renumber
   both small and large-scale networks. The Procedures for
   Internet/Enterprise Renumbering (PIER) working group in the IETF
   urgently requests specific input for producing concrete guidance for
   the renumbering task as quickly as possible.  As part of collecting
   such information, the PIER working group therefore is soliciting
   input from people and organizations with experience in changing the
   IP addresses of enterprise networks or in making major changes in the
   subnetting of existing networks. We are especially interested in
   actual case studies -- that is, accounts describing what was actually
   done to renumber one or more networks.  Information is also solicited
   on specific tools used in the process, and on areas in which tools
   were needed but not available.  Because applications that use IP
   addresses directly in their configuration or security mechanisms pose
   specific difficulties and coordination issues for renumbering, a
   catalogue of such applications is being compiled.

   All interested parties are invited to submit material in any of these
   areas:

   A) Accounts of the experience of renumbering networks:
   -- Retrospective reports on renumbering efforts.
   -- Journals or running accounts of a renumbering effort, written
      while the task is underway.

   B) Information on tools to help renumbering:
   -- Descriptions of tools used, whether commercial, freeware, or ad
      hoc (such as perl scripts).
   -- Descriptions of specific needs where a tool could clearly have
      helped, but none was found.

   C) Information on applications using embedded IP addresses:
   -- Software applications that use embedded IP addresses for security
      keys, authentication, or any other "inappropriate" purposes.
   -- Hardware devices whose IP addresses are hardcoded into the
      hardware design (and so may require extensive time lags to
      retool).
   -- Both software and hardware whose vendors are no longer in business
      and that may require replacement or specialized solutions.

   The focus of this solicitation is on experience with renumbering that
   has been done or is now underway in IPv4 networks, and not on future
   changes to protocols or environments that may eventually be useful.
   We are especially concerned with the most common situation faced
   today: single-homed networks that are not transit providers. However,
   experience with renumbering more complex environments is also

Berkowitz, et al             Informational                      [Page 2]
RFC 1916          Enterprise Renumbering Solicitation      February 1996

   welcome.

   The information provided will be used as an information base from
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