In-situ Flow Information Telemetry
draft-song-opsawg-ifit-framework-12

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Last updated 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

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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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