3Com WX3000 Undo queue-scheduler queue-id, Queue-scheduler wrr group1, Queue-id queue-weight &1-8

Configuration prerequisites

The algorithm for queue scheduling to be used and the related parameters are determined.

Configuration procedure

Follow these steps to configure SP queue scheduling algorithm:

To do…	Use the command…	Remarks
Enter system view	system-view	—
		Optional
Configure SP queue	undo queue-scheduler [ queue-id]	By default, SP queue scheduling
scheduling algorithm	&<1-8>	algorithm is adopted on all the
		output queues of a port.

Follow these steps to configure SDWRR queue scheduling algorithm:

To do…	Use the command…	Remarks
Enter system view	system-view	—
Configure SDWRR	queue-scheduler wrr { group1	Required
	{ queue-id queue-weight } &<1-8>	By default, SP queue scheduling
queue scheduling
	group2 { queue-id queue-weight }	algorithm is adopted on all the
algorithm
	&<1-8> }*	output queues of a port.

A port on a device can accommodate up to eight output queues. You can configure to use SP queue scheduling algorithm, SDWRR queue scheduling algorithm, or combine the two as required.

z

z

With SDWRR queue scheduling algorithm adopted, the output queues of a port can be assigned to group 1 and group 2. The two groups are scheduled using SP algorithm. For example, you can assign queue 0, queue 1, queue 2, and queue 3 to group 1, and assign queue 4, queue 5, queue 6, and queue 7 to group 2. The queues in group 2 are scheduled preferentially using WRR queue scheduling algorithm. Queues in group 1 are scheduled using WRR queue scheduling algorithm only when all the queues in group 2 are empty.

With both SP and SDWRR queue scheduling algorithms adopted, groups are scheduled using SP algorithm. Assume that queue 0 and queue 1 are scheduled using SP algorithm; queue 2, queue 3, and queue 4 are assigned to group 1; queue 5, queue 6, and queue 7 are assigned to group 2. The queues in group 2 are scheduled preferentially using WRR queue scheduling algorithm. When all the queues in group 2 are empty, queues in group 1 are scheduled using WRR queue scheduling algorithm. Then, queue 1 is scheduled, and then queue 0.

When using SDWRR or SP+SDWRR combination for queue scheduling, you are recommended to assign queues with successive queue numbers to the same scheduling group.

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