A Light Weight IOAM for SRv6 Network Programming
draft-li-spring-light-weight-srv6-ioam-01

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Network Working Group                                              C. Li
Internet-Draft                                                    Huawei
Intended status: Standards Track                                W. Cheng
Expires: December 29, 2019                                  China Mobile
                                                                 M. Chen
                                                              S. Previdi
                                                                  Huawei
                                                                   Z. Li
                                                            China Mobile
                                                           June 27, 2019

            A Light Weight IOAM for SRv6 Network Programming
               draft-li-spring-light-weight-srv6-ioam-01

Abstract

   In-situ OAM(IOAM) records OAM information within the packet while the
   packet traverses a particular network domain.  A discussion of the
   motivation and requirements for in-situ OAM can be found in
   [I-D.brockners-inband-oam-requirements].

   This document defines a light weight IOAM method for SRv6 network
   programming.  In this method, IOAM information is carried in the data
   packet by the SIDs in the SRH.

Status of This Memo

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   This Internet-Draft will expire on December 29, 2019.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Li, et al.              Expires December 29, 2019               [Page 1]
Internet-Draft        Light Weight IOAM for SRv6 NP            June 2019

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Requirements Language . . . . . . . . . . . . . . . . . .   4
   3.  SRv6 Light Weight IOAM  . . . . . . . . . . . . . . . . . . .   4
     3.1.  The FLAG Field of SID . . . . . . . . . . . . . . . . . .   4
   4.  Capabilities and SID Format Advertisement . . . . . . . . . .   5
   5.  SIDs Distribution . . . . . . . . . . . . . . . . . . . . . .   5
   6.  Packet Processing . . . . . . . . . . . . . . . . . . . . . .   6
     6.1.  Source SR Node  . . . . . . . . . . . . . . . . . . . . .   6
       6.1.1.  Reduced SRH . . . . . . . . . . . . . . . . . . . . .   6
     6.2.  Transit Node  . . . . . . . . . . . . . . . . . . . . . .   7
     6.3.  SR Segment Endpoint Node  . . . . . . . . . . . . . . . .   7
       6.3.1.  Egress Node . . . . . . . . . . . . . . . . . . . . .   7
     6.4.  Instructions for FLAG . . . . . . . . . . . . . . . . . .   8
   7.  Illustrations . . . . . . . . . . . . . . . . . . . . . . . .   9
     7.1.  Timestamp Recording Procedures  . . . . . . . . . . . . .  10
   8.  Backward Compatibility Considerations . . . . . . . . . . . .  10
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   10. Security Considerations . . . . . . . . . . . . . . . . . . .  10
   11. Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  11
   12. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  11
   13. References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     13.1.  Normative References . . . . . . . . . . . . . . . . . .  11
     13.2.  Informative References . . . . . . . . . . . . . . . . .  12
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   Segment routing (SR) [RFC8402] is a source routing paradigm that
   explicitly indicates the forwarding path for packets at the source
   node by inserting an ordered list of instructions, called segments.
   A segment can represent a topological or service-based instruction.