ALTO-based Broker-assisted Multi-domain Orchestration
draft-lachosrothenberg-alto-brokermdo-04

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ALTO WG                                                        D. Lachos
Internet-Draft                                             C. Rothenberg
Intended status: Informational                                   Unicamp
Expires: January 14, 2021                                  July 13, 2020

         ALTO-based Broker-assisted Multi-domain Orchestration
                draft-lachosrothenberg-alto-brokermdo-04

Abstract

   Evolving networking scenarios (e.g., 5G) demand new multiple
   administrative domain (aka multi-domain) orchestration models.  This
   document proposes a new broker-plane approach working on top of per-
   domain management and orchestration functions to coordinate the
   delivery of a multi-operator End-to-End Network Service (E2ENS).
   This proposed design resorts to the Application-Layer Traffic
   Optimization (ALTO) protocol to offer topology and resource
   information from different administrative domains.  The ALTO services
   with the proposed protocol extension offer aggregated views on
   various types of resources contributing to a more simple and scalable
   solution.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on January 14, 2021.

Copyright Notice

   Copyright (c) 2020 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

Lachos & Rothenberg     Expires January 14, 2021                [Page 1]
Internet-Draft    ALTO-based Multi-domain Orchestration        July 2020

   publication of this document.  Please review these documents
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Problem Statement and Challenges  . . . . . . . . . . . . . .   5
   5.  Proposed Approach . . . . . . . . . . . . . . . . . . . . . .   6
     5.1.  Inter-domain Resource (IdR) Component . . . . . . . . . .   7
     5.2.  Inter-domain Topology (IdT) Component . . . . . . . . . .   7
     5.3.  ALTO Server Functionalities . . . . . . . . . . . . . . .   7
     5.4.  Filtered Cost Map Extension . . . . . . . . . . . . . . .   8
       5.4.1.  Accept Input Parameters . . . . . . . . . . . . . . .   8
       5.4.2.  Response  . . . . . . . . . . . . . . . . . . . . . .   9
     5.5.  Examples of Message Exchange  . . . . . . . . . . . . . .   9
       5.5.1.  Property Map Service  . . . . . . . . . . . . . . . .   9
       5.5.2.  Filtered Cost Map Service . . . . . . . . . . . . . .  10
   6.  Discussion  . . . . . . . . . . . . . . . . . . . . . . . . .  13
     6.1.  Benefits  . . . . . . . . . . . . . . . . . . . . . . . .  14
     6.2.  Open Issues . . . . . . . . . . . . . . . . . . . . . . .  14
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  15
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  15
   9.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  15
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  15
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  15
     10.2.  Informative References . . . . . . . . . . . . . . . . .  16
     10.3.  URIs . . . . . . . . . . . . . . . . . . . . . . . . . .  18
   Appendix A.  Proof of Concept Use Case Implementation . . . . . .  18
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  22

1.  Introduction

   Envisioned 5G network architectures and related service models
   consider broader cooperation between stakeholders in order to provide
   flexible multi-operator multi-domain services.  These multi-provider
   orchestration operations will require the information exchange across
   Multi-domain Orchestrators (MdOs).  The key information to be
   exchanged between MdOs includes the abstract network topology,