We explain the notion of software-defined networking (SDN), whose southbound interface may be implemented by the OpenFlow protocol. We describe the operation of OpenFlow and summarize the features of specification versions 1.0–1.4. We give an overview of existing SDN-based applications grouped by topic areas. Finally, we point out architectural design choices for SDN using OpenFlow and discuss ...

This paper presents a survey of recent work in the development of NetKAT, a formal system for reasoning about packet switching networks, and its role in the emerging area of software-defined networking.

OpenFlow is one of the most commonly used protocols for communication between the controller and the forwarding element in a software defined network (SDN). A model based on M/M/1 queues is proposed in [1] to capture the communication between the forwarding element and the controller. Albeit the model provides useful insight, it is accurate only for the case when the probability of expecting a ...

I. TUTORIAL OBJECTIVE The objective of the tutorial is to discuss the emerging concept of Software Defined Storage (SDS) with practical example. The overall objective of the tutorial: Participants can view a complete picture of storage–the traditional storage, storage in the cloud and the emerging Software Defined Storage. • Providers of storage hardware and software solutions can understand th...

fields, which are needed for checking firewall policy violations, from the pattern expression of a flow rule to represent the space of corresponding flow path. In addition, we reorganize these fields with a (source address, destination address) pair to specify a flow path space. Then, we define three kinds of spaces for representing a flow path space: (1) Incoming Space represents original head...

Software-defined networking (SDN) promises to improve the programmability and flexibility of networks, but it may bring also new challenges that need to be explored. The purpose of this technical report is to assess how the deployment of the SDN controllers affects the overall availability of SDN. For this, we have varied the number, homing and location of SDN controllers. A two-level modelling...