Performance Measurement Using RFC 6374 for Segment Routing Networks with MPLS Data Plane
draft-gandhi-mpls-rfc6374-sr-05
MPLS Working Group R. Gandhi, Ed.
Internet-Draft C. Filsfils
Intended status: Standards Track Cisco Systems, Inc.
Expires: December 27, 2020 D. Voyer
Bell Canada
S. Salsano
Universita di Roma "Tor Vergata"
M. Chen
Huawei
June 25, 2020
Performance Measurement Using RFC 6374 for Segment Routing Networks with
MPLS Data Plane
draft-gandhi-mpls-rfc6374-sr-05
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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material or to cite them other than as "work in progress."
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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