RFC 5226 · BEST CURRENT PRACTICE · 2008

Guidelines for Writing an IANA Considerations Section in RFCs

Overview

RFC 5226, “Guidelines for Writing an IANA Considerations Section in RFCs”, is a Best Current Practice document published in May 2008 by T. Narten, H. Alvestrand. It obsoletes RFC 2434. It has been obsoleted by RFC 8126 — refer to the newer document for the authoritative version. The canonical text is published by the RFC Editor.

Abstract

Many protocols make use of identifiers consisting of constants and other well-known values. Even after a protocol has been defined and deployment has begun, new values may need to be assigned (e.g., for a new option type in DHCP, or a new encryption or authentication transform for IPsec). To ensure that such quantities have consistent values and interpretations across all implementations, their assignment must be administered by a central authority. For IETF protocols, that role is provided by the Internet Assigned Numbers Authority (IANA).

In order for IANA to manage a given namespace prudently, it needs guidelines describing the conditions under which new values can be assigned or when modifications to existing values can be made. If IANA is expected to play a role in the management of a namespace, IANA must be given clear and concise instructions describing that role. This document discusses issues that should be considered in formulating a policy for assigning values to a namespace and provides guidelines for authors on the specific text that must be included in documents that place demands on IANA.

This document obsoletes RFC 2434. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.

Abstract as published in the RFC, via rfc-editor.org.

What “Best Current Practice” means

Documents the IETF community's recommended operational or procedural practice rather than a protocol specification.

Read this RFC

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Relationships to other RFCs
This RFC obsoletes
RFC 2434
Obsoleted by
RFC 8126
Other RFCs from 2008

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