IANA Guidance for Managing the Unidirectional Lightweight Encapsulation (ULE) Next-Header Registry
RFC 7280

Document Type RFC - Proposed Standard (June 2014; No errata)
Updates RFC 4326
Last updated 2014-06-19
Stream IETF
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Stream WG state Submitted to IESG for Publication
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Document shepherd Wesley Eddy
Shepherd write-up Show (last changed 2014-01-30)
IESG IESG state RFC 7280 (Proposed Standard)
Telechat date
Responsible AD Brian Haberman
Send notices to gorry@erg.abdn.ac.uk, draft-fairhurst-ipdvb-ule-iana@ietf.org, wes@mti-systems.com
IANA IANA review state Version Changed - Review Needed
IANA action state RFC-Ed-Ack
Internet Engineering Task Force (IETF)                      G. Fairhurst
Request for Comments: 7280                        University of Aberdeen
Updates: 4326                                                  June 2014
Category: Standards Track
ISSN: 2070-1721

                       IANA Guidance for Managing
the Unidirectional Lightweight Encapsulation (ULE) Next-Header Registry

Abstract

   This document updates RFC 4326 to clarify and update the allocation
   rules for the Unidirectional Lightweight Encapsulation (ULE) Next-
   Header registry.  This registry is used by ULE and Generic Stream
   Encapsulation (GSE) to record the code points of Extension Headers
   and protocols supported by these encapsulation protocols.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7280.

Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Fairhurst                    Standards Track                    [Page 1]
RFC 7280                   IANA ULE Guidelines                 June 2014

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  The ULE Next-Header Registry  . . . . . . . . . . . . . .   3
     2.2.  Informative Example of Using a Value from the Optional
           Range . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Updated IANA Guidance on Allocation in the ULE Next-Header
       Registry  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  ULE Next-Header Registry  . . . . . . . . . . . . . . . .   4
     3.2.  Expert Review Guidelines  . . . . . . . . . . . . . . . .   5
     3.3.  Reservation of Next-Header Values for Private Use . . . .   5
   4.  Update to Registry Information  . . . . . . . . . . . . . . .   6
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   7.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   6
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   7
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   7

1.  Introduction

   The Unidirectional Lightweight Encapsulation (ULE) [RFC4326]
   specifies an encapsulation for links that employ the MPEG-2 Transport
   Stream, with support over a wide variety of physical-layer bearers
   [RFC4259].  The encapsulation header includes a Type field that
   identifies payload types and Extension Headers (e.g., [RFC5163]).
   The ULE specification requested IANA to maintain the ULE Next-Header
   registry to record the allocation of the values used to derive this
   Type field.

   The Digital Video Broadcast (DVB) Project has published an
   encapsulation for second-generation DVB physical layers.  This
   specifies the Generic Stream Encapsulation [GSE].  This encapsulation
   shares many of the network properties of ULE and uses a common format
   for the Type field [RFC5163].  The ULE Next-Header registry is
   therefore also applicable to this encapsulation.

   This document updates the IANA rules and guidance defined in
   Section 11.1 of [RFC4326] in the following way:

   o  The document clarifies use of the ULE Next-Header registry by GSE
      as well as by ULE.

   o  Section 3 specifies that new allocations in the ULE Next-Header
      registry are to be assigned by IANA using the "Specification
      Required" policy and provides guidance to the expert reviewer.

Fairhurst                    Standards Track                    [Page 2]
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