SDN Layers and Architecture Terminology
draft-haleplidis-sdnrg-layer-terminology-01

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SDNRG                                                      E. Haleplidis
Internet-Draft                                                S. Denazis
Intended status: Informational                      University of Patras
Expires: April 03, 2014                                   K. Pentikousis
                                                                    EICT
                                                           J. Hadi Salim
                                                       Mojatatu Networks
                                                          O. Koufopavlou
                                                    University of Patras
                                                      September 30, 2013

                SDN Layers and Architecture Terminology
              draft-haleplidis-sdnrg-layer-terminology-01

Abstract

   Software-Defined Networking (SDN) is a new approach for network
   programmability.  Network programmability refers to the ability to
   control, change, and manage network behavior dynamically through
   software via open interfaces as opposed to relying on closed boxes
   and propietary defined interfaces.  SDN introduces an abstraction for
   the data forwarding plane and by doing so separates it from the
   control plane.  This separation allows faster innovation cycles at
   both planes as experience has already shown.  However, there is
   increasing confusion as to what exactly SDN is, what is the layer
   structure in an SDN architecture and how do layers interface with
   each other.  This document does not aim to standardize any layers or
   interfaces but rather aims to answer these questions and provide a
   concise reference document for SDNRG in particular and the SDN
   community in general.

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   This Internet-Draft will expire on April 03, 2014.

Haleplidis, et al.       Expires April 03, 2014                 [Page 1]
Internet-Draft   SDN Layers and Architecture Terminology  September 2013

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  SDN Layers and Architecture . . . . . . . . . . . . . . . . .   4
     2.1.  Overview  . . . . . . . . . . . . . . . . . . . . . . . .   5
     2.2.  Network Devices . . . . . . . . . . . . . . . . . . . . .   7
     2.3.  Control Plane . . . . . . . . . . . . . . . . . . . . . .   7
     2.4.  Management Plane  . . . . . . . . . . . . . . . . . . . .   8
     2.5.  Service Abstraction Layer . . . . . . . . . . . . . . . .   8
     2.6.  Application Plane . . . . . . . . . . . . . . . . . . . .   9
   3.  SDN Model View  . . . . . . . . . . . . . . . . . . . . . . .   9
     3.1.  ForCES  . . . . . . . . . . . . . . . . . . . . . . . . .   9
     3.2.  NETCONF . . . . . . . . . . . . . . . . . . . . . . . . .   9
     3.3.  OpenFlow  . . . . . . . . . . . . . . . . . . . . . . . .  10
     3.4.  I2RS  . . . . . . . . . . . . . . . . . . . . . . . . . .  10
   4.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  11
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
   7.  Informative References  . . . . . . . . . . . . . . . . . . .  11
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   Software-Defined Networking (SDN) is a relevant new term for the
   programmable networks paradigm.  In short, SDN refers to the ability
   to use software to program individual network devices dynamically and
   therefore control the behavior of the network as a whole.  A key
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