Network Telemetry Framework
draft-ietf-opsawg-ntf-07
OPSAWG H. Song
Internet-Draft Futurewei
Intended status: Informational F. Qin
Expires: August 23, 2021 China Mobile
P. Martinez-Julia
NICT
L. Ciavaglia
Nokia
A. Wang
China Telecom
February 19, 2021
Network Telemetry Framework
draft-ietf-opsawg-ntf-07
Abstract
Network telemetry is a technology for gaining network insight and
facilitating efficient and automated network management. It
encompasses various techniques for remote data generation,
collection, correlation, and consumption. This document describes an
architectural framework for network telemetry, motivated by
challenges that are encountered as part of the operation of networks
and by the requirements that ensue. Network telemetry, as
necessitated by best industry practices, covers technologies and
protocols that extend beyond conventional network Operations,
Administration, and Management (OAM). The presented network
telemetry framework promises flexibility, scalability, accuracy,
coverage, and performance. In addition, it facilitates the
implementation of automated control loops to address both today's and
tomorrow's network operational needs. This document clarifies the
terminologies and classifies the modules and components of a network
telemetry system from several different perspectives. The framework
and taxonomy help to set a common ground for the collection of
related work and provide guidance for related technique and standard
developments.
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 https://datatracker.ietf.org/drafts/current/.
Song, et al. Expires August 23, 2021 [Page 1]
Internet-Draft Network Telemetry Framework February 2021
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."
This Internet-Draft will expire on August 23, 2021.
Copyright Notice
Copyright (c) 2021 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
(https://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. Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Background . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1. Telemetry Data Coverage . . . . . . . . . . . . . . . . . 7
3.2. Use Cases . . . . . . . . . . . . . . . . . . . . . . . . 7
3.3. Challenges . . . . . . . . . . . . . . . . . . . . . . . 9
3.4. Network Telemetry . . . . . . . . . . . . . . . . . . . . 10
4. The Necessity of a Network Telemetry Framework . . . . . . . 12
5. Network Telemetry Framework . . . . . . . . . . . . . . . . . 13
5.1. Top Level Modules . . . . . . . . . . . . . . . . . . . . 14
5.1.1. Management Plane Telemetry . . . . . . . . . . . . . 17
5.1.2. Control Plane Telemetry . . . . . . . . . . . . . . . 17
5.1.3. Forwarding Plane Telemetry . . . . . . . . . . . . . 18
5.1.4. External Data Telemetry . . . . . . . . . . . . . . . 20
5.2. Second Level Function Components . . . . . . . . . . . . 21
5.3. Data Acquisition Mechanism and Type Abstraction . . . . . 22
5.4. Mapping Existing Mechanisms into the Framework . . . . . 24
6. Evolution of Network Telemetry Applications . . . . . . . . . 25
Show full document text