Performance Measurement Using RFC 6374 for Segment Routing Networks with MPLS Data Plane
draft-ietf-mpls-rfc6374-sr-00

Document Type Active Internet-Draft (mpls WG)
Last updated 2020-07-25
Replaces draft-gandhi-mpls-rfc6374-sr
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MPLS Working Group                                        R. Gandhi, Ed.
Internet-Draft                                               C. Filsfils
Intended status: Standards Track                     Cisco Systems, Inc.
Expires: January 27, 2020                                       D. Voyer
                                                             Bell Canada
                                                              S. Salsano
                                        Universita di Roma "Tor Vergata"
                                                                 M. Chen
                                                                  Huawei
                                                           July 26, 2020

Performance Measurement Using RFC 6374 for Segment Routing Networks with
                            MPLS Data Plane
                    draft-ietf-mpls-rfc6374-sr-00

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-MPLS Links and end-to-end Paths
   including SR-MPLS 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 December 27, 2020.

Gandhi, et al.          Expires December 27, 2020               [Page 1]
Internet-Draft         Using RFC 6374 for SR-MPLS              June 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 Extensions  . . . . . . . . . . . . . . .   8
   5.  Delay Measurement . . . . . . . . . . . . . . . . . . . . . .  10
     5.1.  Delay Measurement Message Format  . . . . . . . . . . . .  10
     5.2.  Timestamps  . . . . . . . . . . . . . . . . . . . . . . .  10
   6.  Loss Measurement  . . . . . . . . . . . . . . . . . . . . . .  10
     6.1.  Loss Measurement Message Format . . . . . . . . . . . . .  11
     6.2.  Block Number TLV Extensions . . . . . . . . . . . . . . .  11
     6.3.  Combined Loss/Delay Measurement Message Format  . . . . .  12
   7.  Performance Measurement for P2MP SR-MPLS Policies . . . . . .  12
   8.  ECMP for SR-MPLS Policies . . . . . . . . . . . . . . . . . .  13
   9.  SR-MPLS Link Extended TE Metrics Advertisements . . . . . . .  14
   10. Backwards Compatibility . . . . . . . . . . . . . . . . . . .  14
   11. Security Considerations . . . . . . . . . . . . . . . . . . .  14
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