A Primer on the Development of MPLS
draft-bryant-mpls-dev-primer-00

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Author Stewart Bryant 
Last updated 2021-03-31
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MPLS                                                           S. Bryant
Internet-Draft                                              Futurewei US
Intended status: Informational                            March 31, 2021
Expires: October 2, 2021

                  A Primer on the Development of MPLS
                    draft-bryant-mpls-dev-primer-00

Abstract

   There has been significant recent interest in developing MPLS to
   address new needs.  This memo collects together various documents
   that together describe the key aspects of the MPLS architecture
   together with the development proposals that the author is aware of.

   The purpose of this document is to bring everyone up to speed on the
   rational for the existing design and to alert them to the new
   proposals.

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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   This Internet-Draft will expire on October 2, 2021.

Copyright Notice

   Copyright (c) 2021 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
   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

Bryant                   Expires October 2, 2021                [Page 1]
Internet-Draft               MPLS-Dev-Primer                  March 2021

   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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Background Documents  . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Multiprotocol Label Switching Architecture (RFC 3031) . .   3
     2.2.  MPLS Label Stack Encoding (RFC 3032)  . . . . . . . . . .   4
     2.3.  Control Word for Use over an MPLS PSN (RFC5586) . . . . .   4
     2.4.  Avoiding Equal Cost Multipath (ECMP) Treatment in MPLS
           Network . . . . . . . . . . . . . . . . . . . . . . . . .   5
     2.5.  Synonymous Flow Labels  . . . . . . . . . . . . . . . . .   5
     2.6.  Residence Time Measurement in MPLS Networks . . . . . . .   5
   3.  New Proposals . . . . . . . . . . . . . . . . . . . . . . . .   5
     3.1.  MPLS Extension Header Architecture  . . . . . . . . . . .   5
     3.2.  MPLS Label Operations in MPLS EH capable networks . . . .   6
     3.3.  Encapsulation For MPLS Performance Measurement with
           Alternate Marking . . . . . . . . . . . . . . . . . . . .   7
     3.4.  MPLS Data Plane Encapsulation for In-situ OAM Data  . . .   7
     3.5.  Multi-purpose Special Purpose Label for Forwarding
           Actions . . . . . . . . . . . . . . . . . . . . . . . . .   7
     3.6.  No Further Fast Reroute . . . . . . . . . . . . . . . . .   8
     3.7.  Carrying Virtual Transport Network Identifier in MPLS
           Packet  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     3.8.  Segment Routed Time Sensitive Networking  . . . . . . . .   8
     3.9.  Options for MPLS Extension Header Indicator . . . . . . .   8
     3.10. MPLS Extension Header . . . . . . . . . . . . . . . . . .   9
     3.11. MPLS Payload Protocol Identifier  . . . . . . . . . . . .   9
     3.12. Generic Transport Functions . . . . . . . . . . . . . . .  10
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .  10
     6.2.  Informative References  . . . . . . . . . . . . . . . . .  10
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  13

1.  Introduction

   There has been significant recent interest in developing the MPLS
   data plane to address new needs.  This memo collects together various
   documents that together describe the key aspects of the MPLS
   architecture together with the development proposals that the author
   is aware of.

   The intent of this work is to bring everyone up to speed on the
   rational for the existing design and to alert them to the new
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