Unified Source Routing Instructions using MPLS Label Stack
draft-xu-mpls-unified-source-routing-instruction-04

Document Type Active Internet-Draft (mpls WG)
Last updated 2017-10-29 (latest revision 2017-09-28)
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Network Working Group                                              X. Xu
Internet-Draft                                                    Huawei
Intended status: Standards Track                             A. Bashandy
Expires: April 1, 2018                                             Cisco
                                                            H. Assarpour
                                                                Broadcom
                                                                   S. Ma
                                                                 Juniper
                                                           W. Henderickx
                                                                   Nokia
                                                             J. Tantsura
                                                              Individual
                                                      September 28, 2017

       Unified Source Routing Instructions using MPLS Label Stack
          draft-xu-mpls-unified-source-routing-instruction-04

Abstract

   MPLS Segment Routing (SR-MPLS in short) is an MPLS data plane-based
   source routing paradigm in which a sender of a packet is allowed to
   partially or completely specify the route the packet takes through
   the network by imposing stacked MPLS labels to the packet.  SR-MPLS
   could be leveraged to realize a unified source routing mechanism
   across MPLS, IPv4 and IPv6 data planes by using an MPLS label stack
   as a unified source routing instruction set while preserving backward
   compatibility with SR-MPLS.

Status of This Memo

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   This Internet-Draft will expire on April 1, 2018.

Xu, et al.                Expires April 1, 2018                 [Page 1]
Internet-Draft                     USR                    September 2017

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Use Cases . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Packet Forwarding Procedures  . . . . . . . . . . . . . . . .   4
     4.1.  Forwarding Entry Construction . . . . . . . . . . . . . .   5
     4.2.  Packet Forwarding Procedures  . . . . . . . . . . . . . .   6
   5.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .   9
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  10
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  10
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  13

1.  Introduction

   MPLS Segment Routing (SR-MPLS in short)
   [I-D.ietf-spring-segment-routing-mpls] is an MPLS data plane-based
   source routing paradigm in which a sender of a packet is allowed to
   partially or completely specify the route the packet takes through
   the network by imposing stacked MPLS labels to the packet.  SR-MPLS
   could be leveraged to realize a unified source routing mechanism
   across MPLS, IPv4 and IPv6 data planes by using an MPLS label stack
   as a unified source routing instruction set while preserving backward
   compatibility with SR-MPLS.  More specifically, the source routing
   instruction set information contained in a source routed packet could
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