Service Chaining using an Unified Source Routing Instruction
draft-xu-mpls-service-chaining-02

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Last updated 2017-05-24
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MPLS Working Group                                                 X. Xu
Internet-Draft                                                 S. Bryant
Intended status: Standards Track                                  Huawei
Expires: November 23, 2017                                  H. Assarpour
                                                                Broadcom
                                                                 H. Shah
                                                                   Ciena
                                                            L. Contreras
                                                          Telefonica I+D
                                                              D. Bernier
                                                             Bell Canada
                                                             J. Tantsura
                                                              Individual
                                                                   S. Ma
                                                                 Juniper
                                                            May 22, 2017

      Service Chaining using an Unified Source Routing Instruction
                   draft-xu-mpls-service-chaining-02

Abstract

   Source Packet Routing in Networking (SPRING) WG is developing an MPLS
   source routing mechanism.  The MPLS source routing mechanism can be
   leveraged to realize a unified source routing instruction which works
   across both IPv4 and IPv6 underlays in addition to the MPLS underlay.
   This document describes how to leverage the unified source routing
   instruction to realize a transport-independent service function
   chaining by encoding the service function path information or service
   function chain information as an MPLS label stack.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

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
   Task Force (IETF).  Note that other groups may also distribute
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Xu, et al.              Expires November 23, 2017               [Page 1]
Internet-Draft                                                  May 2017

   Internet-Drafts are draft documents valid for a maximum of six months
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   This Internet-Draft will expire on November 23, 2017.

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   Copyright (c) 2017 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
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Solution Description  . . . . . . . . . . . . . . . . . . . .   3
     3.1.  Encoding SFP Information by an MPLS Label Stack . . . . .   4
     3.2.  Encoding SFC Information by an MPLS Label Stack . . . . .   7
   4.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   9
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  10
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  11

1.  Introduction

   When applying a particular Service Function Chain (SFC) [RFC7665] to
   the traffic selected by a service classifier, the traffic need to be
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