Performance Measurement for Segment Routing Networks with MPLS Data Plane
draft-gandhi-spring-rfc6374-srpm-mpls-01

Document Type Active Internet-Draft (individual)
Last updated 2019-05-15
Replaces draft-gandhi-spring-sr-mpls-pm
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SPRING Working Group                                      R. Gandhi, Ed.
Internet-Draft                                               C. Filsfils
Intended Status: Informational                       Cisco Systems, Inc.
Expires: November 16, 2019                                      D. Voyer
                                                             Bell Canada
                                                              S. Salsano
                                        Universita di Roma "Tor Vergata"
                                                            P. L. Ventre
                                                                    CNIT
                                                                 M. Chen
                                                                  Huawei
                                                            May 15, 2019

                      Performance Measurement for 
              Segment Routing Networks with MPLS Data Plane
                 draft-gandhi-spring-rfc6374-srpm-mpls-01

Abstract

   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 synthetic probe messages.  This document reviews how these
   mechanisms can be used for Performance Delay and Loss Measurements in
   Segment Routing (SR) networks with MPLS data plane (SR-MPLS), for
   both SR links and end-to-end SR Policies.  The Performance
   Measurements (PM) for SR links are used to compute extended Traffic
   Engineering (TE) metrics for delay and loss and can be advertised in
   the network using the routing protocol extensions.

Status of This Memo

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Gandhi, et al.         Expires November 16, 2019                [Page 1]
Internet-Draft            RFC 6374 for SR-MPLS              May 15, 2019

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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Conventions Used in This Document  . . . . . . . . . . . . . .  3
     2.1.  Abbreviations  . . . . . . . . . . . . . . . . . . . . . .  3
     2.2.  Reference Topology . . . . . . . . . . . . . . . . . . . .  4
   3.  Probe Query and Response Packets . . . . . . . . . . . . . . .  5
     3.1.  Probe Packet Header for SR-MPLS Policies . . . . . . . . .  5
     3.2.  Probe Packet Header for SR-MPLS Links  . . . . . . . . . .  6
     3.3.  Probe Response Message for SR-MPLS Links and Policies  . .  6
       3.3.1.  One-way Measurement Mode . . . . . . . . . . . . . . .  6
       3.3.2.  Two-way Measurement Mode . . . . . . . . . . . . . . .  7
         3.3.2.1.  Return Path TLV  . . . . . . . . . . . . . . . . .  7
       3.3.3.  Loopback Measurement Mode  . . . . . . . . . . . . . .  7
   4.  Performance Delay Measurement  . . . . . . . . . . . . . . . .  7
     4.1.  Delay Measurement Message Format . . . . . . . . . . . . .  7
     4.2.  Timestamps . . . . . . . . . . . . . . . . . . . . . . . .  8
   5.  Performance Loss Measurement . . . . . . . . . . . . . . . . .  8
     5.1.  Loss Measurement Message Format  . . . . . . . . . . . . .  9
       5.1.1.  Block Number TLV . . . . . . . . . . . . . . . . . . .  9
   6.  Performance Measurement for P2MP SR Policies . . . . . . . . .  9
   7.  ECMP for SR-MPLS Policies  . . . . . . . . . . . . . . . . . . 10
   8.  SR Link Extended TE Metrics Advertisements . . . . . . . . . . 10
   9.  Security Considerations  . . . . . . . . . . . . . . . . . . . 11
   10.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . 11
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