Indicates a queue group on which traffic shaping is performed. This parameter has 32 bits and each bit represents a queue. To perform traffic shaping on a queue group, you just need to adjust bits to 1. The system currently supports up to eight queues. Traffic shaping, however, is performed only on queues 3 and 4. Hence, the index is variably 00000000 00000000 00000000 00011000 (in binary), that is, 0x18 (in hexadecimal notation).