Accton Technology 24/48-Port, ES4548D, ES4524D manual Selecting the Queue Mode, 55-4, 55-6

26 Class of Service Configuration

Web – Click Priority, Traffic Classes. Assign priorities to the traffic classes (i.e., output queues), then click Apply.

Figure 26-2 Traffic Classes

CLI – The following example shows how to change the CoS assignments to a one-to-one mapping.

Console(config)#interface ethernet 1/1								45-1
Console(config)#queue cos-map 0 0								55-4
Console(config)#queue cos-map 1 1
Console(config)#queue cos-map 2 2
Console(config)#exit
Console#show queue		cos-map						55-6
Information of Eth		1/1
CoS Value:	0	1	2 3	4	5	6	7
Priority Queue: 0		1	2 3	4	5	6	7
Information of Eth		1/2
CoS Value:	0	1	2 3	4	5	6	7
Priority Queue: 0		1	2 3	4	5	6	7
.
.
.

*Mapping specific values for CoS priorities is implemented as an interface configuration command, but any changes will apply to the all interfaces on the switch.

Selecting the Queue Mode

You can set the switch to service the queues based on a strict rule that requires all traffic in a higher priority queue to be processed before lower priority queues are serviced, or use Weighted Round-Robin (WRR) queuing that specifies a relative weight of each queue. WRR uses a predefined relative weight for each queue that determines the percentage of service time the switch services each queue before moving on to the next queue. This prevents the head-of-line blocking that can occur with strict priority queuing.

26-4