code: def stop_capture(self, slot_number, port_number):
          
  
          try:
              adapter = self._slots[slot_number]
          except IndexError:
              raise DynamipsError('Slot {slot_number} does not exist on router "{name}"'.format(name=self._name,
                                                                                                slot_number=slot_number))
          if not adapter.port_exists(port_number):
              raise DynamipsError("Port {port_number} does not exist in adapter {adapter}".format(adapter=adapter,
                                                                                                  port_number=port_number))
  
          nio = adapter.get_nio(port_number)
  
          if not nio:
              raise DynamipsError("Port {slot_number}/{port_number} is not connected".format(slot_number=slot_number,
                                                                                             port_number=port_number))
  
          yield from nio.unbind_filter("both")
  
          log.info('Router "{name}" [{id}]: stopping packet capture on port {slot_number}/{port_number}'.format(name=self._name,
                                                                                                                id=self._id,
                                                                                                                nio_name=nio.name,
                                                                                                                slot_number=slot_number,
                                                                                                                port_number=port_number))
docs: Stops a packet capture.
  
          :param slot_number: slot number
          :param port_number: port number