Browse Prior Art Database

Renumbering Needs Work (RFC1900)

IP.com Disclosure Number: IPCOM000004222D
Original Publication Date: 1996-Feb-01
Included in the Prior Art Database: 2019-Feb-12
Document File: 4 page(s) / 6K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

B. Carpenter: AUTHOR [+1]

Related Documents

10.17487/RFC1900: DOI

Abstract

Hosts in an IP network are identified by IP addresses, and the IP address prefixes of subnets are advertised by routing protocols. A change in such IP addressing information associated with a host or subnet is known as "renumbering". This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 36% of the total text.

Network Working Group B. Carpenter Request for Comments: 1900 Y. Rekhter Category: Informational IAB February 1996

Renumbering Needs Work

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

Renumbering, i.e., changes in the IP addressing information of various network components, is likely to become more and more widespread and common. The Internet Architecture Board (IAB) would like to stress the need to develop and deploy solutions that would facilitate such changes.

Table of Contents

1. Motivation................................................... 1 2. DNS versus IP Addresses...................................... 2 3. Recommendations.............................................. 3 4. Security Considerations...................................... 4 Acknowledgements................................................ 4 Authors’ Addresses.............................................. 4

1. Motivation

Hosts in an IP network are identified by IP addresses, and the IP address prefixes of subnets are advertised by routing protocols. A change in such IP addressing information associated with a host or subnet is known as "renumbering".

Renumbering may occur for a variety of reasons. For example, moving an IP host from one subnet to another requires changing the host’s IP address. Physically splitting a subnet due to traffic overload may also require renumbering. A third example where renumbering may happen is when an organization changes its addressing plan. Such changes imply changing not only hosts’ addresses, but subnet numbers as well. These are just three examples that illustrate possible scenarios where renumbering could occur.

Carpenter & Rekhter Informational [Page 1]

RFC 1900 Renumbering Needs Work February 1996

Increasingly, renumbering will be needed for organizations that require Internet-wide IP connectivity, but do not themselves provide a sufficient degree of address information aggregation. Unless and until viable alternatives are developed, extended deployment of Classless Inter-Domain Routing (CIDR) is vital to keep the Internet routing system alive and to maintain continuous uninterrupted growth of the Internet. With current IP technology, this requires such organizations to use addresses belonging to a single large block of address space, allocated to their current service provider which acts as an aggregator for these addresses. To contain the growth of routing information, whenever such an organization changes to a new service provider, the organization’s addresses will have to change. Occasionally, service providers themselves may have to change to a new and larger block of address space. In either of these cases, to contain the growth of routing information, the organizations concerned would need to renumber their subnet(s) and host(s). If the organization does not renumber, then some of the pote...

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