Cooperating Layered Architecture for SDN
draft-irtf-sdnrg-layered-sdn-01

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Last updated 2016-10-31
Replaces draft-contreras-sdnrg-layered-sdn
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SDN Research Group                                         LM. Contreras
Internet-Draft                                                Telefonica
Intended status: Standards Track                           CJ. Bernardos
Expires: May 4, 2017                                                UC3M
                                                                D. Lopez
                                                              Telefonica
                                                            M. Boucadair
                                                                  Orange
                                                              P. Iovanna
                                                                Ericsson
                                                        October 31, 2016

                Cooperating Layered Architecture for SDN
                    draft-irtf-sdnrg-layered-sdn-01

Abstract

   Software Defined Networking proposes the separation of the control
   plane from the data plane in the network nodes and its logical
   centralization on a control entity.  Most of the network intelligence
   is moved to this functional entity.  Typically, such entity is seen
   as a compendium of interacting control functions in a vertical, tight
   integrated fashion.  The relocation of the control functions from a
   number of distributed network nodes to a logical central entity
   conceptually places together a number of control capabilities with
   different purposes.  As a consequence, the existing solutions do not
   provide a clear separation between transport control and services
   that relies upon transport capabilities.

   This document describes a proposal named Cooperating Layered
   Architecture for SDN.  The idea behind that is to differentiate the
   control functions associated to transport from those related to
   services, in such a way that they can be provided and maintained
   independently, and can follow their own evolution path.

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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Contreras, et al.          Expires May 4, 2017                  [Page 1]
Internet-Draft          Layered SDN Architecture            October 2016

   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 May 4, 2017.

Copyright Notice

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Architecture overview . . . . . . . . . . . . . . . . . . . .   5
     3.1.  Functional strata . . . . . . . . . . . . . . . . . . . .   8
       3.1.1.  Connectivity stratum  . . . . . . . . . . . . . . . .   8
       3.1.2.  Service stratum . . . . . . . . . . . . . . . . . . .   9
       3.1.3.  Recursiveness . . . . . . . . . . . . . . . . . . . .   9
     3.2.  Plane separation  . . . . . . . . . . . . . . . . . . . .   9
       3.2.1.  Control Plane . . . . . . . . . . . . . . . . . . . .   9
       3.2.2.  Management Plane  . . . . . . . . . . . . . . . . . .  10
       3.2.3.  Resource Plane  . . . . . . . . . . . . . . . . . . .  10
   4.  Required features . . . . . . . . . . . . . . . . . . . . . .  10
   5.  Communication between SDN Controllers . . . . . . . . . . . .  11
   6.  Deployment scenarios  . . . . . . . . . . . . . . . . . . . .  11
     6.1.  Full SDN environments . . . . . . . . . . . . . . . . . .  11
       6.1.1.  Multiple Service strata associated to a single
               Connectivity stratum  . . . . . . . . . . . . . . . .  11
       6.1.2.  Single service stratum associated to multiple
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