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IANA Allocation Guidelines For Values In the Internet Protocol and Related Headers (RFC2780)

IP.com Disclosure Number: IPCOM000003379D
Original Publication Date: 2000-Mar-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 8 page(s) / 17K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

S. Bradner: AUTHOR [+2]

Abstract

This memo provides guidance for the IANA to use in assigning parameters for fields in the IPv4, IPv6, ICMP, UDP and TCP protocol headers.

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 17% of the total text.

Network Working Group S. Bradner

Request for Comments: 2780 Harvard University

BCP: 37 V. Paxson

Category: Best Current Practice ACIRI

March 2000

IANA Allocation Guidelines For Values In

the Internet Protocol and Related Headers

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.

Copyright Notice

Copyright (C) The Internet Society (2000). All Rights Reserved.

Abstract

This memo provides guidance for the IANA to use in assigning

parameters for fields in the IPv4, IPv6, ICMP, UDP and TCP protocol

headers.

1. Introduction

For many years the Internet Assigned Numbers Authority (IANA)

(www.iana.org) has allocated parameter values for fields in protocols

which have been created or are maintained by the Internet Engineering

Task Force (IETF). Starting a few years ago the IETF began to

provide the IANA with guidance for the assignment of parameters for

fields in newly developed protocols. Unfortunately this type of

guidance was not consistently provided for the fields in protocols

developed before 1998. This memo attempts to codify existing IANA

practice used in the assignment of parameters in the specific case of

some of these protocols. It is expected that additional memos will

be developed in the future to codify existing practice in other

cases.

This memo addresses the fields within the IPv4, IPv6, ICMP, UDP and

TCP protocol headers for which the IANA assigns values.

The terms "Specification Required", "Expert Review", "IESG Approval",

"IETF Consensus", and "Standards Action", are used in this memo to

refer to the processes described in [CONS].

2. Temporary Assignments

From time to time temporary assignments are made in the values for

fields in these headers for use in experiments. IESG Approval is

required for any such temporary assignments.

3. Version field in the IP header.

The first field in the IP header of all current versions of IP is the

Version field. New values in the Version field define new versions

of the IP protocol and are allocated only after an IETF Standards

Action. It should be noted that some of the Version number bits are

used by TCP/IP header compression schemes. Specifically, the hi-order

bit of the Version field is also used by TCP/IP header compression

[HC], while the three hi-order bits are used by IP Header Compression

[IPHC].

4. IANA Considerations for fields in the IPv4 header

The IPv4 header [V4] contains the following fields that carry values

assigned by the IANA: Version, Type of Service, Protocol, Source

Address, Destination Address, and Option Type.

4....