Applicability of the Path Computation Element (PCE) to the Abstraction and Control of TE Networks (ACTN)
draft-ietf-pce-applicability-actn-09

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Replaces draft-dhody-pce-applicability-actn
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PCE Working Group                                               D. Dhody
Internet-Draft                                                    Y. Lee
Intended status: Informational                       Huawei Technologies
Expires: September 8, 2019                                 D. Ceccarelli
                                                                Ericsson
                                                           March 7, 2019

 Applicability of the Path Computation Element (PCE) to the Abstraction
                   and Control of TE Networks (ACTN)
                  draft-ietf-pce-applicability-actn-09

Abstract

   Abstraction and Control of TE Networks (ACTN) refers to the set of
   virtual network (VN) operations needed to orchestrate, control and
   manage large-scale multi-domain TE networks so as to facilitate
   network programmability, automation, efficient resource sharing, and
   end-to-end virtual service aware connectivity and network function
   virtualization services.

   The Path Computation Element (PCE) is a component, application, or
   network node that is capable of computing a network path or route
   based on a network graph and applying computational constraints.  The
   PCE serves requests from Path Computation Clients (PCCs) that
   communicate with it over a local API or using the Path Computation
   Element Communication Protocol (PCEP).

   This document examines the applicability of PCE to the ACTN
   framework.

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 September 8, 2019.

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Table of Contents

   1.  Background Information  . . . . . . . . . . . . . . . . . . .   2
     1.1.  Path Computation Element (PCE)  . . . . . . . . . . . . .   2
       1.1.1.  Role of PCE in SDN  . . . . . . . . . . . . . . . . .   3
       1.1.2.  PCE in Multi-domain and Multi-layer Deployments . . .   4
       1.1.3.  Relationship to PCE Based Central Control . . . . . .   4
     1.2.  Abstraction and Control of TE Networks (ACTN) . . . . . .   5
   2.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   7
   3.  Architectural Considerations  . . . . . . . . . . . . . . . .   7
     3.1.  Multi-Domain Coordination via Hierarchy . . . . . . . . .   8
     3.2.  Abstraction . . . . . . . . . . . . . . . . . . . . . . .   8
     3.3.  Customer Mapping  . . . . . . . . . . . . . . . . . . . .   9
     3.4.  Virtual Service Coordination  . . . . . . . . . . . . . .  10
   4.  Interface Considerations  . . . . . . . . . . . . . . . . . .  11
   5.  Realizing ACTN with PCE (and PCEP)  . . . . . . . . . . . . .  11
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  15
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  15
   8.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  16
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  16
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  16
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  16
   Appendix A.  Additional Information . . . . . . . . . . . . . . .  21
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  21

1.  Background Information

1.1.  Path Computation Element (PCE)

   The Path Computation Element Communication Protocol (PCEP) [RFC5440]
   provides mechanisms for Path Computation Clients (PCCs) to request a
   Path Computation Element (PCE) [RFC4655] to perform path
   computations.

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