Performance Measurement Using TWAMP Light for Segment Routing Networks
draft-gandhi-spring-twamp-srpm-04
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SPRING Working Group R. Gandhi, Ed.
Internet-Draft C. Filsfils
Intended Status: Standards Track Cisco Systems, Inc.
Expires: May 7, 2020 D. Voyer
Bell Canada
M. Chen
Huawei
B. Janssens
Colt
November 4, 2019
Performance Measurement Using TWAMP Light
for Segment Routing Networks
draft-gandhi-spring-twamp-srpm-04
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 5357 (Two-Way Active Measurement Protocol
(TWAMP) Light) and Simple Two-Way Active Measurement Protocol (STAMP)
for Delay Measurement, and also uses the mechanisms defined in this
document for Loss Measurement. The procedure specified is applicable
to SR-MPLS and SRv6 data planes and are used for both links and
end-to-end SR Policies.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
Copyright Notice
Gandhi, et al. Expires May 7, 2020 [Page 1]
Internet-Draft TWAMP Light for Segment Routing November 4, 2019
Copyright (c) 2019 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
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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
3.1. Example Provisioning Model . . . . . . . . . . . . . . . . 6
3.2. STAMP Applicability . . . . . . . . . . . . . . . . . . . 7
4. Probe Messages . . . . . . . . . . . . . . . . . . . . . . . . 7
4.1. Probe Query Message . . . . . . . . . . . . . . . . . . . 7
4.1.1. Delay Measurement Probe Query Message . . . . . . . . 7
4.1.1.1. Delay Measurement Authentication Mode . . . . . . 8
4.1.2. Loss Measurement Probe Query Message . . . . . . . . . 8
4.1.2.1. Loss Measurement Authentication Mode . . . . . . . 12
4.1.3. Probe Query for SR Links . . . . . . . . . . . . . . . 13
4.1.4. Probe Query for End-to-end Measurement for SR Policy . 13
4.1.4.1. Probe Query Message for SR-MPLS Policy . . . . . . 13
4.1.4.2. Probe Query Message for SRv6 Policy . . . . . . . 13
4.2. Probe Response Message . . . . . . . . . . . . . . . . . . 14
4.2.1. One-way Measurement Mode . . . . . . . . . . . . . . . 18
4.2.2. Two-way Measurement Mode . . . . . . . . . . . . . . . 18
4.2.2.1. Return Path TLV . . . . . . . . . . . . . . . . . 18
4.2.2.2. Probe Response Message for SR-MPLS Policy . . . . 20
4.2.2.3. Probe Response Message for SRv6 Policy . . . . . . 20
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