Service Assurance for Intent-based Networking Architecture
draft-claise-opsawg-service-assurance-architecture-04
OPSAWG B. Claise
Internet-Draft Cisco Systems, Inc.
Intended status: Informational J. Quilbeuf
Expires: July 6, 2021 Independent
D. Lopez
Telefonica I+D
D. Voyer
Bell Canada
T. Arumugam
Cisco Systems, Inc.
January 2, 2021
Service Assurance for Intent-based Networking Architecture
draft-claise-opsawg-service-assurance-architecture-04
Abstract
This document describes an architecture for Service Assurance for
Intent-based Networking (SAIN). This architecture aims at assuring
that service instances are correctly running. As services rely on
multiple sub-services by the underlying network devices, getting the
assurance of a healthy service is only possible with a holistic view
of network devices. This architecture not only helps to correlate
the service degradation with the network root cause but also the
impacted services when a network component fails or degrades.
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
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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
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 July 6, 2021.
Claise, et al. Expires July 6, 2021 [Page 1]
Internet-DrafService Assurance for Intent-based Networking January 2021
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Table of Contents
1. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 5
3. Architecture . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1. Decomposing a Service Instance Configuration into an
Assurance Graph . . . . . . . . . . . . . . . . . . . . . 9
3.2. Intent and Assurance Graph . . . . . . . . . . . . . . . 10
3.3. Subservices . . . . . . . . . . . . . . . . . . . . . . . 11
3.4. Building the Expression Graph from the Assurance Graph . 11
3.5. Building the Expression from a Subservice . . . . . . . . 12
3.6. Open Interfaces with YANG Modules . . . . . . . . . . . . 12
3.7. Handling Maintenance Windows . . . . . . . . . . . . . . 13
3.8. Flexible Architecture . . . . . . . . . . . . . . . . . . 14
3.9. Timing . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.10. New Assurance Graph Generation . . . . . . . . . . . . . 15
4. Security Considerations . . . . . . . . . . . . . . . . . . . 16
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 16
6. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 16
7. Open Issues . . . . . . . . . . . . . . . . . . . . . . . . . 16
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 16
8.1. Normative References . . . . . . . . . . . . . . . . . . 16
8.2. Informative References . . . . . . . . . . . . . . . . . 17
Appendix A. Changes between revisions . . . . . . . . . . . . . 18
Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 18
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 19
1. Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
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