NOTE
In stacking mode, the qosp7 queue is reserved as Strict Priority under weighted queuing. Attempts to change the qosp7
setting are ignored.
WRR is the default queuing method and uses a default set of queue weights.
The number of packets serviced during each visit to a queue depends on the percentages you configure for the queues. The
software automatically converts the percentages you specify into weights for the queues.
NOTE
Queue cycles on the FastIron devices are based on bytes. These devices service a given number of bytes (based on
weight) in each queue cycle.
•
Strict Priority (SP)—This ensures service for high-priority traffic. The software assigns the maximum weights to each queue, to
cause the queuing mechanism to serve as many packets in one queue as possible before moving to a lower queue. This method
biases the queuing mechanism to favor the higher queues over the lower queues.
For example, strict queuing processes as many packets as possible in qosp3 before processing any packets in qosp2, then
processes as many packets as possible in qosp2 before processing any packets in qosp1, and so on.
•
Hybrid WRR and SP—This configurable queueing mechanism combines both the SP and WRR mechanisms. The combined
method enables the device to give strict priority to delay-sensitive traffic such as VoIP traffic, and weighted round robin priority to
other traffic types.
By default, when you select the combined SP and WRR queueing method, the device assigns strict priority to traffic in qosp7 and
qosp6, and weighted round robin priority to traffic in qosp0 through qosp5. Thus, the device schedules traffic in queue 7 and
queue 6 first, based on the strict priority queueing method. When there is no traffic in queue 7 and queue 6, the device schedules
the other queues in round-robin fashion from the highest priority queue to the lowest priority queue.
NOTE
Stackable devices that are operating as members of a stack reserve queue 7 for stacking functions. For more
information, refer to
QoS for Ruckus ICX stackable devices
on page 15.
By default, when you specify the combined SP and WRR queuing method, the system balances the traffic among the queues as
shown in the following table. If desired, you can change the default bandwidth values.
TABLE 12 Default bandwidth for combined SP and WRR queueing methods
Queue
Default bandwidth
qosp7
Strict Priority (highest priority)
qosp6
Strict Priority
qosp5
25%
qosp4
15%
qosp3
15%
qosp2
15%
qosp1
15%
qosp0
15% (lowest priority)
Quality of Service
QoS scheduling and queuing methods
Ruckus FastIron QoS and Traffic Management Configuration Guide, 08.0.70
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Part Number: 53-1005294-01
