Updates to the IS-IS TLV Codepoints Registry
RFC 7370

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Internet Engineering Task Force (IETF)                       L. Ginsberg
Request for Comments: 7370                                 Cisco Systems
Category: Standards Track                                 September 2014
ISSN: 2070-1721

              Updates to the IS-IS TLV Codepoints Registry

Abstract

   This document recommends some editorial changes to the IANA "IS-IS
   TLV Codepoints" registry to more accurately document the state of the
   protocol.  It also sets out new guidelines for Designated Experts to
   apply when reviewing allocations from the registry.

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/rfc7370.

Ginsberg                     Standards Track                    [Page 1]
RFC 7370                  IS-IS TLV Codepoints            September 2014

Copyright Notice

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

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   This document may contain material from IETF Documents or IETF
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   Without obtaining an adequate license from the person(s) controlling
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   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

Ginsberg                     Standards Track                    [Page 2]
RFC 7370                  IS-IS TLV Codepoints            September 2014

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   2.  IS Neighbor Sub-TLV Registry  . . . . . . . . . . . . . . . .   4
   3.  Prefix Reachability Sub-TLV Registry  . . . . . . . . . . . .   4
   4.  Guidance for Designated Experts . . . . . . . . . . . . . . .   4
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     7.2.  Informative References  . . . . . . . . . . . . . . . . .   6
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .   7
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   The "IS-IS TLV Codepoints" registry was created by [RFC3563] and
   extended by [RFC6233].  The assignment policy for the registry is
   "Expert Review" as defined in [RFC5226].  As documents related to
   IS-IS are developed, the codepoints required for the protocol
   extensions are reviewed by the Designated Experts and added to the
   IANA-managed registry.  As these documents are published as RFCs, the
   registries are updated to reference the relevant RFC.

   In the case of TLVs supporting prefix advertisement, currently
   separate sub-TLV registries are maintained for each TLV.  These
   registries need to be combined into a common sub-TLV registry similar
   to what has been done for neighbor advertisement TLVs.

   In some cases, there is a need to allocate codepoints defined in
   Internet-Drafts (I-Ds) that seem likely to eventually gain Working
   Group approval, without waiting for those I-Ds to be published as
   RFCs.  This can be achieved using Expert Review, and this document
   sets out guidance for the Designated Experts to apply when reviewing
   allocations from the registry.

1.1.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",