Service Assurance for Intent-based Networking Architecture
draft-claise-opsawg-service-assurance-architecture-04

Document Type Active Internet-Draft (individual)
Authors BenoĆ®t Claise  , Jean Quilbeuf  , Diego Lopez  , Daniel Voyer  , Thangam Arumugam 
Last updated 2021-01-02
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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
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   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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