Implementation of an OpenFlow network virtualization for multi-controller environment

To share Future Internet OpenFlow testbed with multi-users using multi-controllers without each other´s intervention, network virtualization based on FlowVisor should be implemented. For network resource virtualization, bandwidth isolation at allocated switches on a given slice and admission control are required. In this paper, we implemented admission control and minimum bandwidth guaranteeing scheme at the FlowVisor and tested the transmission performance of QoS-video streams on this testbed. Using our enhanced FlowVisor, we show that each user´s bandwidth requirement can be guaranteed irrespective of other users´ flow traffic.