Performance Measurement Using TWAMP Light for Segment Routing Networks
draft-gandhi-spring-twamp-srpm-04

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SPRING Working Group                                      R. Gandhi, Ed.
Internet-Draft                                               C. Filsfils
Intended Status: Standards Track                     Cisco Systems, Inc.
Expires: May 7, 2020                                            D. Voyer
                                                             Bell Canada
                                                                 M. Chen
                                                                  Huawei
                                                             B. Janssens
                                                                    Colt
                                                        November 4, 2019

                Performance Measurement Using TWAMP Light
                      for Segment Routing Networks
                    draft-gandhi-spring-twamp-srpm-04

Abstract

   Segment Routing (SR) leverages the source routing paradigm.  SR is
   applicable to both Multiprotocol Label Switching (SR-MPLS) and IPv6
   (SRv6) data planes.  This document specifies procedure for sending
   and processing probe query and response messages for Performance
   Measurement (PM) in Segment Routing networks.  The procedure uses the
   mechanisms defined in RFC 5357 (Two-Way Active Measurement Protocol
   (TWAMP) Light) and Simple Two-Way Active Measurement Protocol (STAMP)
   for Delay Measurement, and also uses the mechanisms defined in this
   document for Loss Measurement.  The procedure specified is applicable
   to SR-MPLS and SRv6 data planes and are used for both links and
   end-to-end SR Policies.

Status of This Memo

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Copyright Notice

 

Gandhi, et al.            Expires May 7, 2020                   [Page 1]
Internet-Draft      TWAMP Light for Segment Routing     November 4, 2019

   Copyright (c) 2019 IETF Trust and the persons identified as the
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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Conventions Used in This Document  . . . . . . . . . . . . . .  4
     2.1.  Requirements Language  . . . . . . . . . . . . . . . . . .  4
     2.2.  Abbreviations  . . . . . . . . . . . . . . . . . . . . . .  4
     2.3.  Reference Topology . . . . . . . . . . . . . . . . . . . .  5
   3.  Overview . . . . . . . . . . . . . . . . . . . . . . . . . . .  5
     3.1.  Example Provisioning Model . . . . . . . . . . . . . . . .  6
     3.2.  STAMP Applicability  . . . . . . . . . . . . . . . . . . .  7
   4.  Probe Messages . . . . . . . . . . . . . . . . . . . . . . . .  7
     4.1.  Probe Query Message  . . . . . . . . . . . . . . . . . . .  7
       4.1.1.  Delay Measurement Probe Query Message  . . . . . . . .  7
         4.1.1.1.  Delay Measurement Authentication Mode  . . . . . .  8
       4.1.2.  Loss Measurement Probe Query Message . . . . . . . . .  8
         4.1.2.1.  Loss Measurement Authentication Mode . . . . . . . 12
       4.1.3.  Probe Query for SR Links . . . . . . . . . . . . . . . 13
       4.1.4.  Probe Query for End-to-end Measurement for SR Policy . 13
         4.1.4.1.  Probe Query Message for SR-MPLS Policy . . . . . . 13
         4.1.4.2.  Probe Query Message for SRv6 Policy  . . . . . . . 13
     4.2.  Probe Response Message . . . . . . . . . . . . . . . . . . 14
       4.2.1.  One-way Measurement Mode . . . . . . . . . . . . . . . 18
       4.2.2.  Two-way Measurement Mode . . . . . . . . . . . . . . . 18
         4.2.2.1.  Return Path TLV  . . . . . . . . . . . . . . . . . 18
         4.2.2.2.  Probe Response Message for SR-MPLS Policy  . . . . 20
         4.2.2.3.  Probe Response Message for SRv6 Policy . . . . . . 20