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Comparisons of SDN OpenFlow Controllers over EstiNet: Ryu vs. NOX

Authors:
Shie-Yuan Wang
Hung-Wei Chiu
Chih-Liang Chou

Keywords: SDN; OpenFlow; Network Simulator

Abstract:
SDN (Software-defined Networks) is a new approach to networking in which the control plane is extracted from the switch and put into the software application called the controller. In an SDN, the controller controls all networking switches and implements specific network protocols or functions. So far, the OpenFlow protocol is the most popular protocol used to exchange messages between the controller and OpenFlow switches. In this paper, we use the EstiNet OpenFlow network simulator and emulator to compare two open source popular OpenFlow controllers --- Ryu and NOX. We studied the behavior of Ryu when it controls a network with loops and how quickly Ryu and NOX can find a new routing path for a greedy TCP flow after a link's status has changed. Our simulation results show that (1) Ryu results in the packet broadcast storm problem in a network with loops; (2) Ryu and NOX have different behavior and performance in detecting link failure and changing to a new routing path.

Pages: 244 to 249

Copyright: Copyright (c) IARIA, 2015

Publication date: April 19, 2015

Published in: conference

ISSN: 2308-4413

ISBN: 978-1-61208-398-8

Location: Barcelona, Spain

Dates: from April 19, 2015 to April 24, 2015