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

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Last updated 2019-06-27
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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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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.
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