The conception of software defined networking (SDN) provides an opportunity for a high-level, hardware independent management of infocommunicational networks. This software control makes network operation more flexible, where network traffic is managable in flow level. As a result the strict quality of service requirements can be met.
The goal of this thesis is demonstrating the QoS functions in concrete SDN networks. I created the system design of an OpenFlow-enabled sample network which is implemented with the network devices provided by the Department of Telecommunications and Media Informatics. By testing this sample network I presented the proper working of the quality of service functions. After investigating the opportunities provided by the OpenFlow protocol I compared them to the options granted by the real OpenFlow-capable equipments. In the sample network I tested the effect of the OpenFlow-capable switch’s different QoS configurations on the network traffic.
The resulting sample network is suitable for testing later quality of service functions or other OpenFlow-capable network elements.