Siemens S323, S223 user manual Weighted Fair Queuing, Strict Priority Queuing SP

UMN:CLI	User Manual
	SURPASS hiD 6615 S223/S323 R1.5

Fig. 7.2 Weighted Fair Queuing

Strict Priority Queuing (SP)

SPQ processes first more important data than the others. Since all data are processed by their priority, data with high priority can be processed fast but data without low priority might be delayed and piled up. This method has a strong point of providing the distin- guished service with a simple way. However, if the packets having higher priority enter, the packets having lower priority are not processed.

The processing order in Strict Priority Queuing in case of entering packets having the Queue numbers as below

Lowest priority highest priority

1

3

3

3

4

4

6

7

7

7

7

Output Scheduler

1 3 3

3

4

4

6

7

7

7

7

Fig. 7.3 Strict Priority Queuing

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