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Procedure for Defining New DHCP Options (RFC2489)

IP.com Disclosure Number: IPCOM000003069D
Original Publication Date: 1999-Jan-01
Included in the Prior Art Database: 2019-Feb-11
Document File: 5 page(s) / 7K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

R. Droms: AUTHOR

Related Documents

10.17487/RFC2489: DOI

Abstract

This document describes the procedure for defining new DHCP options. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 32% of the total text.

Network Working Group R. Droms Request for Comments: 2489 Bucknell University BCP: 29 January 1999 Category: Best Current Practice

Procedure for Defining New DHCP Options

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 (1999). All Rights Reserved.

Abstract

The Dynamic Host Configuration Protocol (DHCP) provides a framework for passing configuration information to hosts on a TCP/IP network. Configuration parameters and other control information are carried in tagged data items that are stored in the ’options’ field of the DHCP message. The data items themselves are also called "options."

New DHCP options may be defined after the publication of the DHCP specification to accommodate requirements for conveyance of new configuration parameters. This document describes the procedure for defining new DHCP options.

1. Introduction

The Dynamic Host Configuration Protocol (DHCP) [1] provides a framework for passing configuration information to hosts on a TCP/IP network. Configuration parameters and other control information are carried in tagged data items that are stored in the ’options’ field of the DHCP message. The data items themselves are also called "options." [2]

This document describes the procedure for defining new DHCP options. The procedure will guarantee that:

* allocation of new option numbers is coordinated from a single authority, * new options are reviewed for technical correctness and appropriateness, and * documentation for new options is complete and published.

Droms Best Current Practice [Page 1]

RFC 2489 Defining New DCHP Options January 1999

As indicated in "Guidelines for Writing an IANA Considerations Section in RFCs" (see references), IANA acts as a central authority for assignment of numbers such as DHCP option codes. The new procedure outlined in this document will provide guidance to IANA in the assignment of new option codes.

2. Overview and background

The procedure described in this document modifies and clarifies the procedure for defining new options in RFC 2131 [2]. The primary modification is to the time at which a new DHCP option is assigned an option number. In the procedure described in this document, the option number is not assigned until specification for the option is about to be published as an RFC.

Since the publication of RFC 2132, the option number space for publically defined DHCP options (1-127) has almost been exhausted. Many of the defined option numbers have not been followed up with Internet Drafts submitted to the DHC WG. There has been a lack of specific guidance to IANA from the DHC WG as to the assignment of DHCP option numbers

The procedure as specified in RFC 2132 does not clearly state that new options are to be reviewed individually for technical correctness, appropriateness and complete...

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