def METHOD_NAME(self):
    results = self.stl_trex.scan6(ports = 0)
    if self.is_loopback:
        # negative test, loopback
        if results[0]:
            self.fail("Scan6 found devices in loopback, we don't answer to IPv6 now, bug!\nOutput: %s" % results)
        else:
            print('No devices found in loopback as expected.')
    else:
        # positive test, DUT
        if len(results[0]) > 1:
            self.fail('Found more than one device at port 0: %s' % results)
        elif len(results[0]) == 1:
            print('Found one device as expected:\n{type:10} - {mac:20} - {ipv6}'.format(**results[0][0]))
        else:
            self.fail('Did not find IPv6 devices.')