121
© 2010 Taylor & Francis Group, LLC
6
COntrOller arChiteCture
and perFOrmanCe in
sOFtware-deFined
netwOrks
TING ZHANG AND FEI HU
Introduction
e control plane is usually embodied by a central controller, provid-
ing a global view of the underlying network situation to the upper
application layer. In this chapter, we look into the architecture and
performance of the controller in software-defined networks (SDNs)
[1] and also provide comparisons of their features. We first review the
Contents
Introduction 121
Controllers in SDNs 124
Types of Controllers in SDNs 124
Examples of OpenFlow Controllers 124
Methods to Increase Controller Performance in SDN 125
New Techniques in the Controller of SDNs 126
Drawbacks on Current Available Controllers 126
Controller ...