4.1.3 Scheduling

Scheduling is functionality that controls the order in which the frames in each queue will be sent.

The Switch has the following two scheduling types: The default behavior is PQ. The following table describes the scheduling operations:

Table 4-1: Scheduling operation
Scheduling type	Conceptual diagram	Description	Application example
PQ		Complete priority queuing. 8 queues per port. When there are frames in multiple queues, the frames in a higher-priority queue (Q#8, Q#7...Q#1) are always sent first.	When traffic priority must be strictly observed
2PQ+6DRR		Top-priority queues and weighted (number of bytes) round-robin. 8 queues per port. Queue 8 (Q#8) is the top-priority queue and always sends frames first. Queue 7 (Q#7) has the second highest priority and sends frames next. If there are no frames in queues 8 and 7, queues 6 to 1 (Q#6~Q#1) send frames in bytes according to the ratio (z:y:x:w:v:u) set for each queue.	When the top-priority queues are used for video and audio data, and the DRR queue is used for data traffic

The following table describes the scheduling specifications.

Table 4-2: Scheduling specifications
Item		Specifications
Number of queues		8 queues
2PQ+6DRR	Weight setting range of queues 1 to 6	1~254