Cisco 350 Series Administration Manual page 639

Quality of Service
General
STEP 1
STEP 2
STEP 3
Cisco 350, 350X and 550X Series Managed Switches, Firmware Release 2.4, ver 0.4
When the queuing mode is Weighted Round Robin, queues are serviced until their quota has
been used up and then another queue is serviced.
It is also possible to assign some of the lower queues to WRR, while keeping some of the
higher queues in strict priority. In this case traffic for the strict priority queues is always sent
before traffic from the WRR queues. Only after the strict priority queues have been emptied is
traffic from the WRR queues forwarded. (The relative portion from each WRR queue depends
on its weight).
To select the priority method and enter WRR data.
Click Quality of Service > General > Queue.
Enter the parameters.
• Queue—Displays the queue number.
• Scheduling Method—Select one of the following options:
- Strict Priority—Traffic scheduling for the selected queue and all higher queues is
based strictly on the queue priority.
- WRR—Traffic scheduling for the selected queue is based on WRR. The period time
is divided between the WRR queues that are not empty, meaning they have
descriptors to egress. This division happens only if the strict priority queues are
empty.
- WRR Weight—If WRR is selected, enter the WRR weight assigned to the queue.
- % of WRR Bandwidth—Displays the amount of bandwidth assigned to the queue.
These values represent the percent of the WRR weight.
Click Apply. The queues are configured, and the Running Configuration file is updated.
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