In-situ Flow Information Telemetry
draft-song-opsawg-ifit-framework-12
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2020-04-14
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OPSAWG H. Song
Internet-Draft Futurewei
Intended status: Informational F. Qin
Expires: October 16, 2020 China Mobile
H. Chen
China Telecom
J. Jin
LG U+
J. Shin
SK Telecom
April 14, 2020
In-situ Flow Information Telemetry
draft-song-opsawg-ifit-framework-12
Abstract
As networks increase in scale and network operations become more
sophisticated, traditional Operation, Administration and Maintenance
(OAM) methods, which include proactive and reactive techniques,
running in active and passive modes, are no longer sufficient to meet
the monitoring and measurement requirements. Emerging on-path
telemetry techniques which provide high-precision flow insight and
real-time issue notification are required to ensure suitable quality
of experience for users and applications, and identify faults or
network deficiencies before they become critical.
This document outlines a high-level framework to provide an
operational environment that utilizes existing and emerging on-path
telemetry techniques to enable the collection and correlation of
performance information from the network. The framework identifies
the components that are needed to coordinate the existing protocol
tools and telemetry mechanisms, and addresses key deployment
challenges for flow-oriented on-path telemetry techniques, especially
in carrier networks.
The framework is informational and intended to guide system designers
attempting to use the referenced techniques as well as to motivate
further work to enhance the ecosystem .
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
Song, et al. Expires October 16, 2020 [Page 1]
Internet-Draft IFIT April 2020
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://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
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material or to cite them other than as "work in progress."
This Internet-Draft will expire on October 16, 2020.
Copyright Notice
Copyright (c) 2020 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
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described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Classification and Modes of On-path Telemetry . . . . . . 4
1.2. Requirements and Challenges . . . . . . . . . . . . . . . 6
1.3. Scope . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.4. Glossary . . . . . . . . . . . . . . . . . . . . . . . . 8
1.5. Requirements Language . . . . . . . . . . . . . . . . . . 9
2. IFIT Overview . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1. Typical Deployment of IFIT . . . . . . . . . . . . . . . 10
2.2. IFIT Architecture . . . . . . . . . . . . . . . . . . . . 11
2.3. Relationship with Network Telemetry Framework (NTF) . . . 12
3. Key Components of IFIT . . . . . . . . . . . . . . . . . . . 13
3.1. Flexible Flow, Packet, and Data Selection . . . . . . . . 13
3.1.1. Block Diagram . . . . . . . . . . . . . . . . . . . . 14
3.1.2. Example: Sketch-guided Elephant Flow Selection . . . 14
3.1.3. Example: Adaptive Packet Sampling . . . . . . . . . . 14
3.2. Flexible Data Export . . . . . . . . . . . . . . . . . . 15
3.2.1. Block Diagram . . . . . . . . . . . . . . . . . . . . 15
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