Performance Measurement for Segment Routing Networks with MPLS Data Plane
draft-gandhi-mpls-rfc6374-sr-02

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Last updated 2020-03-06
Replaces draft-gandhi-spring-rfc6374-srpm-mpls
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MPLS Working Group                                        R. Gandhi, Ed.
Internet-Draft                                               C. Filsfils
Intended status: Standards Track                     Cisco Systems, Inc.
Expires: September 7, 2020                                      D. Voyer
                                                             Bell Canada
                                                              S. Salsano
                                        Universita di Roma "Tor Vergata"
                                                                 M. Chen
                                                                  Huawei
                                                           March 6, 2020

  Performance Measurement for Segment Routing Networks with MPLS Data
                                 Plane
                    draft-gandhi-mpls-rfc6374-sr-02

Abstract

   Segment Routing (SR) leverages the source routing paradigm.  RFC 6374
   specifies protocol mechanisms to enable the efficient and accurate
   measurement of packet loss, one-way and two-way delay, as well as
   related metrics such as delay variation in MPLS networks using probe
   messages.  This document utilizes these mechanisms for Performance
   Delay and Loss Measurements in Segment Routing networks with MPLS
   data plane (SR-MPLS), for both SR Links and end-to-end SR Policies.
   In addition, this document defines Return Path TLV for two-way
   performance measurement and Block Number TLV for loss measurement.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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

Gandhi, et al.          Expires September 7, 2020               [Page 1]
Internet-Draft            RFC 6374 for SR-MPLS                March 2020

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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
   4.  Probe Query and Response Messages . . . . . . . . . . . . . .   6
     4.1.  Probe Message for SR-MPLS Links . . . . . . . . . . . . .   6
     4.2.  Probe Message for SR-MPLS Policies  . . . . . . . . . . .   6
     4.3.  Probe Response Message for SR-MPLS Links and Policies . .   7
       4.3.1.  One-way Measurement Mode  . . . . . . . . . . . . . .   7
       4.3.2.  Two-way Measurement Mode  . . . . . . . . . . . . . .   8
       4.3.3.  Loopback Measurement Mode . . . . . . . . . . . . . .   8
     4.4.  Return Path TLV . . . . . . . . . . . . . . . . . . . . .   8
   5.  Performance Delay Measurement . . . . . . . . . . . . . . . .  10
     5.1.  Delay Measurement Message Format  . . . . . . . . . . . .  10
     5.2.  Timestamps  . . . . . . . . . . . . . . . . . . . . . . .  10
   6.  Performance Loss Measurement  . . . . . . . . . . . . . . . .  10
     6.1.  Loss Measurement Message Format . . . . . . . . . . . . .  11
     6.2.  Block Number TLV  . . . . . . . . . . . . . . . . . . . .  11
   7.  Performance Measurement for P2MP SR Policies  . . . . . . . .  12
   8.  ECMP for SR-MPLS Policies . . . . . . . . . . . . . . . . . .  13
   9.  SR Link Extended TE Metrics Advertisements  . . . . . . . . .  13
   10. Security Considerations . . . . . . . . . . . . . . . . . . .  14
   11. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  14
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .  14
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