Cisco 220 Series Smart Plus Reference Manual page 418

QoS Commands
wrr-queue bandwidth
Cisco 220 Series Smart Plus Switches Command Line Interface Reference Guide Release 1.0.0.x
All three queues participate in the WRR, excluding the expedite queues, whose
corresponding weight is not used in the ratio calculation.
An expedite (SP) queue is a priority queue, which is serviced until empty before
the other queues are serviced. The expedite queues are designated by the
priority-queue out num-of-queues command.
Example
switchxxxxxx(config)# priority-queue out num-of-queues 4
switchxxxxxx(config)# wrr-queue bandwidth 6 6 6 6
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