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