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Suggestion for New Classes of IP Addresses (RFC1375)

IP.com Disclosure Number: IPCOM000002199D
Original Publication Date: 1992-Oct-01
Included in the Prior Art Database: 2019-Feb-11
Document File: 7 page(s) / 10K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

P. Robinson: AUTHOR

Related Documents

10.17487/RFC1375: DOI

Abstract

This RFC suggests a change in the method of specifying the IP address to add new classes of networks to be called F, G, H, and K, to reduce the amount of wasted address space, and to increase the available IP address number space, especially for smaller organizations or classes of connectors that do not need or do not want a full Class C IP address. This memo provides information for the Internet community. It does not specify an Internet standard.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 20% of the total text.

Network Working Group P. Robinson Request for Comments: 1375 Tansin A. Darcos & Co. October 1992

Suggestion for New Classes of IP Addresses

Status of this Memo

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

Abstract

This RFC suggests a change in the method of specifying the IP address to add new classes of networks to be called F, G, H, and K, to reduce the amount of wasted address space, and to increase the available IP address number space, especially for smaller organizations or classes of connectors that do not need or do not want a full Class C IP address.

Table of Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Suggestion for new IP address classes . . . . . . . . . . . . . 2 Current Class C Address . . . . . . . . . . . . . . . . . . 3 Proposed new Class C Address . . . . . . . . . . . . . . . 4 Proposed "Class F" address . . . . . . . . . . . . . . . . 4 Proposed "Class G" address . . . . . . . . . . . . . . . . 4 Proposed "Class H" address . . . . . . . . . . . . . . . . 5 Proposed "Class K" address . . . . . . . . . . . . . . . . 5 Optional selection of routing codes by region . . . . . . . . . 5 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Security Considerations . . . . . . . . . . . . . . . . . . . . 7 Author’s Address . . . . . . . . . . . . . . . . . . . . . . . . 7

Introduction

Currently, IP addresses on the Internet are 32-bit quantities which are generally represented as four decimal numbers from 0 to 255, separated by periods, sometimes called a "dotted" decimal number. The current numbering scheme provides in general for three classes of networks in general use (A,B, and C), and two other classes of networks (D, E).

The Class A networks assign a large address space for the particular

Robinson [Page 1]

RFC 1375 New Classes of IP Addresses October 1992

network to allow up to 254^3 local machines [1]. The Class B network assigns a somewhat smaller address space for the particular network to allow up to 254^2 local machines. The Class C network assigns a still smaller address space for the particular network to allow up to 254 local machines.

This memo proposes to assign part of the unused Class C address space for smaller networks than are currently available. The term "Class D" is used for the "multicast" capability and addresses in "Class E" are reserved for future use. Therefore, these new features for which capability is to be added is being referred to as classes F, G, H and K.

Suggestion for new IP address classes

The most worrisome problem which appears in the literature is the possibility of running out of address space for IP addresses. Various schemes are being suggested such as subrouting, introduction of additional bits, and other possibilities.

There is an even more serious matter. In all probability, I susp...

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