In-situ Flow Information Telemetry
draft-song-opsawg-ifit-framework-10

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OPSAWG                                                      H. Song, Ed.
Internet-Draft                                                 Futurewei
Intended status: Informational                                    F. Qin
Expires: July 3, 2020                                       China Mobile
                                                                 H. Chen
                                                           China Telecom
                                                                  J. Jin
                                                                   LG U+
                                                                 J. Shin
                                                              SK Telecom
                                                       December 31, 2019

                   In-situ Flow Information Telemetry
                  draft-song-opsawg-ifit-framework-10

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, become more susceptible to
   measurement accuracy and misconfiguration errors.  With the advent of
   programmable data-plane, emerging on-path telemetry techniques
   provide unprecedented flow insight and realtime notification of
   network issues.

   This document enumerates the key deployment challenges for flow-
   oriented on-path telemetry techniques, especially in carrier operator
   networks.  To address these issues, a high-level framework, In-situ
   Flow Information Telemetry (iFIT), is outlined. iFIT includes several
   essential functional components that can be materialized and
   assembled to implement a complete solution for on-path telemetry.

   This informational document aims to clarify the problem domain, and
   summarize the best practices and sensible system design
   considerations.  The iFIT framework helps to guide the analysis on
   the current standard status and gaps, and motivate new works to
   complete the ecosystem.  It also helps to inspire innovative network
   telemetry applications supporting advanced network operations.  As a
   reference and open framework, iFIT does not specify the
   implementation of the components and the interfaces between the
   components.  The compliance with iFIT framework is not mandatory for
   telemetry applications either.

Song, et al.              Expires July 3, 2020                  [Page 1]
Internet-Draft               IFIT Framework                December 2019

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Requirements and Challenges . . . . . . . . . . . . . . .   4
     1.2.  Scope . . . . . . . . . . . . . . . . . . . . . . . . . .   6
     1.3.  Glossary  . . . . . . . . . . . . . . . . . . . . . . . .   6
     1.4.  Requirements Language . . . . . . . . . . . . . . . . . .   7
   2.  iFIT Framework Overview . . . . . . . . . . . . . . . . . . .   7
     2.1.  iFIT Network Architecture . . . . . . . . . . . . . . . .   8
       2.1.1.  On-path Telemetry Models: Passport vs. Postcard . . .   9
     2.2.  iFIT Framework Architecture . . . . . . . . . . . . . . .  10
     2.3.  Relationship with Network Telemetry Framework (NTF) . . .  11
   3.  Key Components of iFIT  . . . . . . . . . . . . . . . . . . .  11
     3.1.  Smart Flow, Packet, and Data Selection  . . . . . . . . .  11
       3.1.1.  Block Diagram . . . . . . . . . . . . . . . . . . . .  12
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