Configuring Quality of Service 339
• Weighted Round Robin—Ensures that a single application does not dominate the
forwarding capacity of PowerConnect 3324/3348. Weighted Round Robin (WRR)
forwards entire queues in a round robin order. Queue priorities are defined by the
queue length. The longer the queue length, the higher the queue's forwarding priority.
For example, if four queues have queue weights of 1, 2, 3 and 4, packets with the
highest forwarding priority are assigned to queue 4, and packets with the lowest
forwarding priority are assigned to queue 1. By providing highest forwarding priority to
queue 4 , weighted round robin processes higher priority traffic and ensures that low-
priority traffic is forwarded satisfactorily.
The scheduling scheme is enabled system-wide. Queues assigned to the strict priority policy
are automatically assigned to the highest priority queue. By default, all values are set as
strict priority. When changing to WRR mode, the default weight value is one. Queue
weight values can be assigned in any order using WRR. WRR values can be assigned on a
per-system basis. Best effort traffic is always assigned to the first queue. WRR values must
be assigned so that Queue 1 remains best effort.
Defining QoS Global Parameters
Quality of Service global parameters are set from the QoS Global Parameter pages. To open
the QoS Global Parameters page:
• Select Quality of Service > Global Parameters in the Tree View. The QoS Global
Parameters page opens.
QoS Global Parameters Page
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