Special Purpose Label terminology
draft-ietf-mpls-spl-terminology-04

Document Type Active Internet-Draft (mpls WG)
Last updated 2020-09-24
Replaces draft-andersson-mpls-spl-terminology
Stream IETF
Intended RFC status Informational
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Send notices to Nicolai Leymann <n.leymann@telekom.de>
IANA IANA review state Version Changed - Review Needed
MPLS Working Group                                          L. Andersson
Internet-Draft                                  Bronze Dragon Consulting
Updates: 3032, 7274 (if approved)                            K. Kompella
Intended status: Standards Track                        Juniper Networks
Expires: March 28, 2021                                        A. Farrel
                                                      Old Dog Consulting
                                                      September 24, 2020

                   Special Purpose Label terminology
                   draft-ietf-mpls-spl-terminology-04

Abstract

   This document discusses and recommends a terminology that may be used
   when MPLS Special Purpose Labels (SPL) are specified and documented.

   This document applies that terminology change to the relevant IANA
   registry and also clarifies the use of the Entropy Label Indicator
   (7) when immediately preceded by the Extension Label (15).

   This document updates RFC 7274 and RFC 3032.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   Internet-Drafts are draft documents valid for a maximum of six months
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   This Internet-Draft will expire on March 28, 2021.

Copyright Notice

   Copyright (c) 2020 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
   (https://trustee.ietf.org/license-info) in effect on the date of

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   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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   include Simplified BSD License text as described in Section 4.e of
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Background  . . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  GMPLS Special Purpose Labels  . . . . . . . . . . . . . .   3
   3.  Terminology and Abbreviations . . . . . . . . . . . . . . . .   3
   4.  Clarification on Use of Entropy Label Indicator . . . . . . .   5
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   6
   8.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .   6
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   7
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   RFC 7274 [RFC7274] made some changes to the terminology used for MPLS
   Special Purpose Labels, but did not define consistent terminology.

   One thing that RFC 7274 did was to deprecate use of the term
   "reserved labels" when describing a range of labels allocated from a
   registry maintained by IANA.  The term "Reserved" in such a registry
   means "set aside, not to be used", but that range of labels was
   available for allocation according to the policies set out in that
   registry.  The name "Special Purpose Labels" was introduced in RFC
   7274 in place of the previous term, and the abbreviation SPL was
   recommended.

   At the time of writing the first version of this document, the IETF
   was in the process of allocating the very first SPLs from the
   Extended SPL (eSPL) range [RFC8595].  This document discusses and
   recommends terminology and abbreviations to be used when talking
   about and documenting Special Purpose Labels.

   This document updates RFC 3032 [RFC3032] and RFC 7274 [RFC7274] in
   that it changes the terminology for both Base SPLs and Extended SPLs.

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