Performance Measurement Using Simple TWAMP (STAMP) for Segment Routing Networks
draft-gandhi-spring-stamp-srpm-03

Document Type Active Internet-Draft (individual)
Authors Rakesh Gandhi  , Clarence Filsfils  , Daniel Voyer  , Mach Chen  , Bart Janssens 
Last updated 2020-10-21
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SPRING Working Group                                      R. Gandhi, Ed.
Internet-Draft                                               C. Filsfils
Intended status: Standards Track                     Cisco Systems, Inc.
Expires: April 24, 2021                                         D. Voyer
                                                             Bell Canada
                                                                 M. Chen
                                                                  Huawei
                                                             B. Janssens
                                                                    Colt
                                                        October 21, 2020

 Performance Measurement Using Simple TWAMP (STAMP) for Segment Routing
                                Networks
                   draft-gandhi-spring-stamp-srpm-03

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 8762 (Simple Two-Way Active Measurement
   Protocol (STAMP)) and its TLV extensions for Performance Measurement.
   The procedure specified is applicable to SR-MPLS and SRv6 data planes
   and is used for both Links and end-to-end SR Paths including SR
   Policies.

Status of This Memo

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   This Internet-Draft will expire on April 24, 2021.

Gandhi, et al.           Expires April 24, 2021                 [Page 1]
Internet-Draft       Using STAMP for Segment Routing        October 2020

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Conventions Used in This Document . . . . . . . . . . . . . .   3
     2.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
     2.2.  Abbreviations . . . . . . . . . . . . . . . . . . . . . .   3
     2.3.  Reference Topology  . . . . . . . . . . . . . . . . . . .   4
   3.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   5
     3.1.  Example Provisioning Model  . . . . . . . . . . . . . . .   6
   4.  Probe Messages  . . . . . . . . . . . . . . . . . . . . . . .   7
     4.1.  Probe Query Message . . . . . . . . . . . . . . . . . . .   7
       4.1.1.  Delay Measurement Query Message . . . . . . . . . . .   7
       4.1.2.  Loss Measurement Query Message  . . . . . . . . . . .   8
       4.1.3.  Probe Query for Links . . . . . . . . . . . . . . . .   8
       4.1.4.  Probe Query for SR Policy . . . . . . . . . . . . . .   9
     4.2.  Probe Response Message  . . . . . . . . . . . . . . . . .  11
       4.2.1.  One-way Measurement Mode  . . . . . . . . . . . . . .  11
       4.2.2.  Two-way Measurement Mode  . . . . . . . . . . . . . .  11
       4.2.3.  Loopback Measurement Mode . . . . . . . . . . . . . .  13
     4.3.  Additional Probe Message Processing Rules . . . . . . . .  14
       4.3.1.  TTL and Hop Limit . . . . . . . . . . . . . . . . . .  14
       4.3.2.  Router Alert Option . . . . . . . . . . . . . . . . .  14
       4.3.3.  UDP Checksum  . . . . . . . . . . . . . . . . . . . .  14
   5.  Performance Measurement for P2MP SR Policies  . . . . . . . .  15
   6.  ECMP Support for SR Policies  . . . . . . . . . . . . . . . .  16
   7.  Performance Delay and Liveness Monitoring . . . . . . . . . .  16
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  17
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  17
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