def METHOD_NAME(duthost):
    """ cleanup FDB before test run """
    if fdb_table_has_no_dynamic_macs(duthost):
        return
    else:
        duthost.command('sonic-clear fdb all')
        assert wait_until(20, 2, 0, fdb_table_has_no_dynamic_macs,
                          duthost), "FDB Table Cleanup failed"