Future<List<OFStatistics>> future;
IOFSwitch iofSwitch = this.openFlowSwitch;
if(iofSwitch == null){
throw new NoSwitchException(HexString.toHexString(this.datapathId));
}
OFStatisticsRequest req = new OFStatisticsRequest();
OFPortStatisticsRequest fsr = new OFPortStatisticsRequest();
fsr.setPortNumber(OFPort.OFPP_NONE.getValue());
req.setStatisticType(OFStatisticsType.PORT);