def setup_iperf_server(self, protocol='TCP', port=5001, window=None):
        """iperf -s
        """
        iperf = iperf_driver.IPerfDriver()
        try:
            data = iperf.start_server(protocol='TCP', port=5001, window=None)
            return agent_utils.make_response(code=0, data=data)
        except:
            message = 'Start iperf server failed!'
            return agent_utils.make_response(code=1, message=message)
iperf -s