Performance Measurement for Segment Routing Networks with MPLS Data Plane
draft-gandhi-mpls-rfc6374-sr-00
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2019-10-18
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draft-gandhi-spring-rfc6374-srpm-mpls
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On Agenda |
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spring at IETF-106
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MPLS Working Group R. Gandhi, Ed.
Internet-Draft C. Filsfils
Intended Status: Standards Track Cisco Systems, Inc.
Expires: April 20, 2020 D. Voyer
Bell Canada
S. Salsano
Universita di Roma "Tor Vergata"
M. Chen
Huawei
October 18, 2019
Performance Measurement for
Segment Routing Networks with MPLS Data Plane
draft-gandhi-mpls-rfc6374-sr-00
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 (SR) networks with
MPLS data plane (SR-MPLS), for both SR links and end-to-end SR
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.
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 April 20, 2020 [Page 1]
Internet-Draft RFC 6374 for SR-MPLS October 18, 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
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
4. Probe Query and Response Packets . . . . . . . . . . . . . . . 6
4.1. Probe Packet Header for SR-MPLS Policies . . . . . . . . . 6
4.2. Probe Packet Header for SR-MPLS Links . . . . . . . . . . 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 . . . . . . . . . . . . . . . 7
4.3.2.1. Return Path TLV . . . . . . . . . . . . . . . . . 7
4.3.3. Loopback Measurement Mode . . . . . . . . . . . . . . 9
5. Performance Delay Measurement . . . . . . . . . . . . . . . . 9
5.1. Delay Measurement Message Format . . . . . . . . . . . . . 9
5.2. Timestamps . . . . . . . . . . . . . . . . . . . . . . . . 9
6. Performance Loss Measurement . . . . . . . . . . . . . . . . . 10
6.1. Loss Measurement Message Format . . . . . . . . . . . . . 10
6.1.1. Block Number TLV . . . . . . . . . . . . . . . . . . . 11
7. Performance Measurement for P2MP SR Policies . . . . . . . . . 11
8. ECMP for SR-MPLS Policies . . . . . . . . . . . . . . . . . . 12
9. SR Link Extended TE Metrics Advertisements . . . . . . . . . . 12
10. Security Considerations . . . . . . . . . . . . . . . . . . . 13
11. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 13
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