In-band Performance Measurement Using TWAMP for Segment Routing Networks
draft-gandhi-spring-twamp-srpm-00
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Rakesh Gandhi
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Clarence Filsfils
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Daniel Voyer
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2019-02-09
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SPRING Working Group R. Gandhi, Ed.
Internet-Draft C. Filsfils
Intended Status: Standards Track Cisco Systems, Inc.
Expires: August 13, 2019 D. Voyer
Bell Canada
February 9, 2019
In-band Performance Measurement Using TWAMP
for Segment Routing Networks
draft-gandhi-spring-twamp-srpm-00
Abstract
Segment Routing (SR) is applicable to both Multiprotocol Label
Switching (SR-MPLS) and IPv6 (SRv6) data planes. This document
specifies procedures for sending and processing in-band probe query
and response messages for Performance Measurement. The procedure
uses the mechanisms defined in RFC 5357 (Two-Way Active Measurement
Protocol (TWAMP)) for Delay Measurement, and also uses the mechanisms
for direct-mode loss measurement defined in this document. The
procedure specified is applicable to SR-MPLS and SRv6 data planes for
both links and end-to-end measurement for 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
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
Gandhi, et al. Expires August 13, 2019 [Page 1]
Internet-Draft TWAMP for Segment Routing February 9, 2019
(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
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described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Conventions Used in This Document . . . . . . . . . . . . . . 3
2.1. Requirements Language . . . . . . . . . . . . . . . . . . 3
2.2. Abbreviations . . . . . . . . . . . . . . . . . . . . . . 3
2.3. Reference Topology . . . . . . . . . . . . . . . . . . . . 4
2.4. In-band Probe Messages . . . . . . . . . . . . . . . . . . 5
3. Probe Messages . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1. Probe Query Message . . . . . . . . . . . . . . . . . . . 5
3.1.1. Delay Measurement Probe Query Message . . . . . . . . 5
3.1.2. Loss Measurement Probe Query Message . . . . . . . . . 6
3.1.3. Probe Query for SR Links . . . . . . . . . . . . . . . 10
3.1.4. Probe Query for End-to-end Measurement for SR Policy . 11
3.1.4.1. Probe Query Message for SR-MPLS Policy . . . . . . 11
3.1.4.2. Probe Query Message for SRv6 Policy . . . . . . . 11
3.2. Probe Response Message . . . . . . . . . . . . . . . . . . 12
3.2.1. One-way Measurement . . . . . . . . . . . . . . . . . 12
3.2.2. Two-way Measurement . . . . . . . . . . . . . . . . . 12
3.2.2.1. Probe Response Message for SR-MPLS Policy . . . . 13
3.2.2.2. Probe Response Message for SRv6 Policy . . . . . . 13
4. Packet Loss Calculation . . . . . . . . . . . . . . . . . . . 13
5. Performance Measurement for P2MP SR Policies . . . . . . . . . 14
6. ECMP Support . . . . . . . . . . . . . . . . . . . . . . . . . 14
7. Security Considerations . . . . . . . . . . . . . . . . . . . 14
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 15
9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 15
9.1. Normative References . . . . . . . . . . . . . . . . . . . 15
9.2. Informative References . . . . . . . . . . . . . . . . . . 15
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 18
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 18
1. Introduction
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