Return a percentage of the current used xdsl upload 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

def get_up_used_bandwith(self):
        """
        Return a percentage of the current used xdsl upload 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
        """
        ip_stats_up = self.get_ip_stats()['tx']
        percent = ip_stats_up['bandwidth']*100/ip_stats_up['maxBandwidth']
        return int(percent)