Performance Measurement Using TWAMP Light for Segment Routing Networks
draft-gandhi-spring-twamp-srpm-02
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SPRING Working Group R. Gandhi, Ed.
Internet-Draft C. Filsfils
Intended Status: Standards Track Cisco Systems, Inc.
Expires: March 2, 2020 D. Voyer
Bell Canada
M. Chen
Huawei
B. Janssens
Colt
August 30, 2019
Performance Measurement Using TWAMP Light
for Segment Routing Networks
draft-gandhi-spring-twamp-srpm-02
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 synthetic 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) 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
Copyright (c) 2019 IETF Trust and the persons identified as the
Gandhi, et al. Expires March 2, 2020 [Page 1]
Internet-Draft TWAMP Light for Segment Routing August 30, 2019
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
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 for TWAMP Light . . . . . . . . 6
3.2. STAMP Applicability . . . . . . . . . . . . . . . . . . . 6
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 . . . . . . . 11
4.1.3. Probe Query for SR Links . . . . . . . . . . . . . . . 11
4.1.4. Probe Query for End-to-end Measurement for SR Policy . 12
4.1.4.1. Probe Query Message for SR-MPLS Policy . . . . . . 12
4.1.4.2. Probe Query Message for SRv6 Policy . . . . . . . 12
4.2. Probe Response Message . . . . . . . . . . . . . . . . . . 13
4.2.1. One-way Measurement Mode . . . . . . . . . . . . . . . 15
4.2.2. Two-way Measurement Mode . . . . . . . . . . . . . . . 16
4.2.2.1. Return Path TLV . . . . . . . . . . . . . . . . . 16
4.2.2.2. Probe Response Message for SR-MPLS Policy . . . . 17
4.2.2.3. Probe Response Message for SRv6 Policy . . . . . . 18
4.2.3. Loopback Measurement Mode . . . . . . . . . . . . . . 18
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