Intent-Based Networking - Concepts and Definitions
draft-irtf-nmrg-ibn-concepts-definitions-01

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Last updated 2020-03-09
Replaces draft-clemm-nmrg-dist-intent
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Network Working Group                                           A. Clemm
Internet-Draft                                                 Futurewei
Intended status: Informational                              L. Ciavaglia
Expires: September 10, 2020                                        Nokia
                                                            L. Granville
                         Federal University of Rio Grande do Sul (UFRGS)
                                                             J. Tantsura
                                                            Apstra, Inc.
                                                           March 9, 2020

           Intent-Based Networking - Concepts and Definitions
              draft-irtf-nmrg-ibn-concepts-definitions-01

Abstract

   Intent and Intent-Based Networking (IBN) are taking the industry by
   storm.  At the same time, those terms are used loosely and often
   inconsistently, in many cases overlapping and confused with other
   concepts such as "Policy".  This document clarifies the concept of
   "Intent" and provides an overview of functionality that is associated
   with it.  The goal is to contribute towards a common and shared
   understanding of terms, concepts, and functionality that can be used
   as foundation to guide further definition of associated research and
   engineering problems and their solutions.

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/.

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   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 September 10, 2020.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Clemm, et al.          Expires September 10, 2020               [Page 1]
Internet-Draft                                                March 2020

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Key Words . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Definitions and Acronyms  . . . . . . . . . . . . . . . . . .   4
   4.  Introduction of Concepts  . . . . . . . . . . . . . . . . . .   5
     4.1.  Intent and Intent-Based Management  . . . . . . . . . . .   5
     4.2.  Related Concepts  . . . . . . . . . . . . . . . . . . . .   6
       4.2.1.  Service Models  . . . . . . . . . . . . . . . . . . .   7
       4.2.2.  Policy and Policy-Based Network Management  . . . . .   8
       4.2.3.  Distinguishing between Intent, Policy, and Service
               Models  . . . . . . . . . . . . . . . . . . . . . . .  10
   5.  Principles  . . . . . . . . . . . . . . . . . . . . . . . . .  11
   6.  Intent-Based Networking - Functionality . . . . . . . . . . .  14
     6.1.  Intent Fulfillment  . . . . . . . . . . . . . . . . . . .  14
     6.2.  Intent Assurance  . . . . . . . . . . . . . . . . . . . .  15
   7.  Life-cycle  . . . . . . . . . . . . . . . . . . . . . . . . .  16
   8.  Items for Discussion  . . . . . . . . . . . . . . . . . . . .  17
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  18
   10. Security Considerations . . . . . . . . . . . . . . . . . . .  18
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  19
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  19
     11.2.  Informative References . . . . . . . . . . . . . . . . .  20
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  21

1.  Introduction

   Traditionally in the IETF, interest regarding management and
   operations has focused on individual network and device features.
   Standardization emphasis has generally been put on management
   instrumentation that needed to be provided to a networking device.  A
   prime example of this is SNMP-based management and the 200+ MIBs that
   have been defined by the IETF over the years.  More recent examples
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