hwCBQoSQueueLength 1.3.6.1.4.1.43.45.1.5.25.32.1.1.2.6.1.3

The length of QueueLength. Only valid for tail-drop type of AF and WFQ queue. -1 is returned only when getting value about EF queue or wred type of AF and WFQ queue. -1 can't be set.