Framework for Abstraction and Control of TE Networks (ACTN)
RFC 8453

Document Type RFC - Informational (August 2018; No errata)
Last updated 2018-08-23
Replaces draft-ceccarelli-teas-actn-framework
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Stream WG state Submitted to IESG for Publication
Document shepherd Vishnu Beeram
Shepherd write-up Show (last changed 2018-01-26)
IESG IESG state RFC 8453 (Informational)
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Responsible AD Deborah Brungard
Send notices to Vishnu Beeram <vbeeram@juniper.net>
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Internet Engineering Task Force (IETF)                D. Ceccarelli, Ed.
Request for Comments: 8453                                      Ericsson
Category: Informational                                      Y. Lee, Ed.
ISSN: 2070-1721                                                   Huawei
                                                             August 2018

      Framework for Abstraction and Control of TE Networks (ACTN)

Abstract

   Traffic Engineered (TE) networks have a variety of mechanisms to
   facilitate the separation of the data plane and control plane.  They
   also have a range of management and provisioning protocols to
   configure and activate network resources.  These mechanisms represent
   key technologies for enabling flexible and dynamic networking.  The
   term "Traffic Engineered network" refers to a network that uses any
   connection-oriented technology under the control of a distributed or
   centralized control plane to support dynamic provisioning of end-to-
   end connectivity.

   Abstraction of network resources is a technique that can be applied
   to a single network domain or across multiple domains to create a
   single virtualized network that is under the control of a network
   operator or the customer of the operator that actually owns the
   network resources.

   This document provides a framework for Abstraction and Control of TE
   Networks (ACTN) to support virtual network services and connectivity
   services.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Not all documents
   approved by the IESG are candidates for any level of Internet
   Standard; see Section 2 of RFC 7841.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   https://www.rfc-editor.org/info/rfc8453.

Ceccarelli & Lee              Informational                     [Page 1]
RFC 8453                     ACTN Framework                  August 2018

Copyright Notice

   Copyright (c) 2018 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.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   5
     2.2.  VNS Model of ACTN . . . . . . . . . . . . . . . . . . . .   7
       2.2.1.  Customers . . . . . . . . . . . . . . . . . . . . . .   9
       2.2.2.  Service Providers . . . . . . . . . . . . . . . . . .   9
       2.2.3.  Network Operators . . . . . . . . . . . . . . . . . .  10
   3.  ACTN Base Architecture  . . . . . . . . . . . . . . . . . . .  10
     3.1.  Customer Network Controller . . . . . . . . . . . . . . .  12
     3.2.  Multi-Domain Service Coordinator  . . . . . . . . . . . .  13
     3.3.  Provisioning Network Controller . . . . . . . . . . . . .  13
     3.4.  ACTN Interfaces . . . . . . . . . . . . . . . . . . . . .  14
   4.  Advanced ACTN Architectures . . . . . . . . . . . . . . . . .  15
     4.1.  MDSC Hierarchy  . . . . . . . . . . . . . . . . . . . . .  15
     4.2.  Functional Split of MDSC Functions in Orchestrators . . .  16
   5.  Topology Abstraction Methods  . . . . . . . . . . . . . . . .  18
     5.1.  Abstraction Factors . . . . . . . . . . . . . . . . . . .  18
     5.2.  Abstraction Types . . . . . . . . . . . . . . . . . . . .  19
       5.2.1.  Native/White Topology . . . . . . . . . . . . . . . .  19
       5.2.2.  Black Topology  . . . . . . . . . . . . . . . . . . .  19
       5.2.3.  Grey Topology . . . . . . . . . . . . . . . . . . . .  20
     5.3.  Methods of Building Grey Topologies . . . . . . . . . . .  21
       5.3.1.  Automatic Generation of Abstract Topology by
               Configuration . . . . . . . . . . . . . . . . . . . .  22
       5.3.2.  On-Demand Generation of Supplementary Topology via
               Path Compute Request/Reply  . . . . . . . . . . . . .  22
     5.4.  Hierarchical Topology Abstraction Example . . . . . . . .  23
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