The Per-Path Service Instruction (PPSI) Option
draft-bonica-6man-vpn-dest-opt-06

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6man                                                           R. Bonica
Internet-Draft                                          Juniper Networks
Intended status: Standards Track                               Y. Kamite
Expires: January 7, 2020                  NTT Communications Corporation
                                                               C. Lenart
                                                                 Verizon
                                                                   N. So
                                                                   F. Xu
                                                            Reliance Jio
                                                             G. Presbury
                                                  Hughes Network Systems
                                                                 G. Chen
                                                                   Baidu
                                                                  Y. Zhu
                                                                 G. Yang
                                                           China Telecom
                                                                 Y. Zhou
                                                               ByteDance
                                                            July 6, 2019

             The Per-Path Service Instruction (PPSI) Option
                   draft-bonica-6man-vpn-dest-opt-06

Abstract

   SRv6+ encodes Per-Path Service Instructions (PPSI) in a new IPv6
   option, called the PPSI Option.  This document describes the PPSI
   Option.

Status of This Memo

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   This Internet-Draft will expire on January 7, 2020.

Bonica, et al.           Expires January 7, 2020                [Page 1]
Internet-Draft      Per-Path Service Instruction Opt           July 2019

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   3
   3.  PPSI Identifiers  . . . . . . . . . . . . . . . . . . . . . .   3
   4.  The PPSI Option . . . . . . . . . . . . . . . . . . . . . . .   3
   5.  Destination Option Header Considerations  . . . . . . . . . .   4
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   4
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   5
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   5
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   6
   Appendix A.  Virtual Private Networks (VPN) . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   An SRv6+ [I-D.bonica-spring-srv6-plus] path provides unidirectional
   connectivity from its ingress node to its egress node.  While an
   SRv6+ path can follow the least cost path from ingress to egress, it
   can also follow any other path.

   SRv6+ paths are encoded as IPv6 [RFC8200] header chains.  When an
   SRv6+ ingress node receives a packet, it encapsulates the packet in
   an IPv6 header chain.  It then forwards the encapsulated packet to
   the path's egress node.  When the egress node receives the packet, it
   processes the SRv6+ payload (i.e., the original packet).

   SRv6+ paths are programmable.  They support several instruction
   types, including Per-Path Service Instructions (PPSI).  PPSIs
   determine how path egress nodes process SRv6+ payloads.  In the
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