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Software-Defined Networking (SDN): Layers and Architecture Terminology (RFC7426)

IP.com Disclosure Number: IPCOM000240167D
Original Publication Date: 2015-Jan-01
Included in the Prior Art Database: 2015-Jan-08
Document File: 70 page(s) / 85K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

E. Haleplidis: AUTHOR [+8]

Abstract

view of the various planes, which is devoid of implementation details. Many implementations in the past have opted for placing the management plane on top of the control plane. This can be interpreted as having the control plane acting as a service to the management plane. Further, in many networks, especially in Internet routers and Ethernet switches, the control plane has been usually implemented as tightly coupled with the network device. When taken as a whole, the control plane has been distributed network-wide. On the other hand, the management plane has been traditionally centralized and has been responsible for managing the control plane and the devices. However, with the adoption of SDN principles, this distinction is no longer so clear-cut.

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Internet Research Task Force (IRTF)                   E. Haleplidis, Ed. Request for Comments: 7426                          University of Patras Category: Informational                              K. Pentikousis, Ed. ISSN: 2070-1721                                                     EICT                                                               S. Denazis                                                     University of Patras                                                            J. Hadi Salim                                                        Mojatatu Networks                                                                 D. Meyer                                                                  Brocade                                                           O. Koufopavlou                                                     University of Patras                                                             January 2015

  Software-Defined Networking (SDN): Layers and Architecture Terminology

Abstract

   Software-Defined Networking (SDN) refers to a new approach for

   network programmability, that is, the capacity to initialize,

   control, change, and manage network behavior dynamically via open

   interfaces.  SDN emphasizes the role of software in running networks

   through the introduction of 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 the layer structure is in an SDN

   architecture, and how layers interface with each other.  This

   document, a product of the IRTF Software-Defined Networking Research

   Group (SDNRG), addresses these questions and provides a concise

   reference for the SDN research community based on relevant peer-

   reviewed literature, the RFC series, and relevant documents by other

   standards organizations.

Haleplidis, et al.            Informational                     [Page 1]
 RFC 7426        SDN: Layers and Architecture Terminology    January 2015

 Status of This Memo

   This document is not an Internet Standards Track specification; it is   ...