code: def get_down_used_bandwith(self):
          
          ip_stats_up = self.get_ip_stats()['rx']
          percent = ip_stats_up['bandwidth']*100/ip_stats_up['maxBandwidth']
          return int(percent)
docs: Return a percentage of the current used xdsl download bandwith
          Instant measure, can be very different from one call to another
          :return: 0 no bandwith is used, 100 all your bandwith is used
          :rtype: int