LevelOne FGL-2870 - Manual (Page 310)

Configuring the Switch
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3
Web – Click Priority, Traffic Classes. Assign priorities to the traffic classes (i.e.,
output queues), then click Apply.
Figure 3-146 Traffic Classes
CLI – The following example shows how to change the CoS assignments.
* 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.
Command Usage
• Strict priority requires all traffic in a higher priority queue to be processed before
lower priority queues are serviced.
• WRR uses a relative weighting for each queue which determines the amount of
packets the switch transmits every time it services each queue before moving on
to the next queue. Thus, a queue weighted 8 will be allowed to transmit up to 8
packets, after which the next lower priority queue will be serviced according to it’s
weighting. This prevents the head-of-line blocking that can occur with strict priority
queuing.
Console(config)#interface ethernet 1/1 4-220
Console(config-if)#queue cos-map 0 0 4-359
Console(config-if)#queue cos-map 1 1
Console(config-if)#queue cos-map 2 2
Console(config-if)#end
Console#show queue cos-map ethernet 1/1
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Information of Eth 1/1
CoS Value: 0 1 2 3 4 5 6 7
Priority Queue: 0 1 2 1 2 2 3 3
Console#