hwCBQoSQueueCbsRatio 1.3.6.1.4.1.43.45.1.5.25.32.1.1.2.6.1.9

Committed Burst Size Ratio. Unit: byte. CBS = CBS_Ratio * Bandwidth(kbps) Only valid for EF queue. -1 is returned only when getting value about AF or WFQ queue. -1 can't be set.