Configuring the ECN330-switch
3291553-KDU 137 365 Uen D 2006-06-16
6.14.1.3 Selecting the Queue Mode
The ECN330-switch can be set 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, Weighted Round-Robin (WRR) queuing that specifies a
relative weight of each queue, Weighted Fair Queuing (WFQ) that specifies a
minimum bandwidth for each queue, or a combination of strict service for the
high priority queues and either WRR or WFQ for the remaining queues.
Command Attributes
• Port – The port number on the ECN330.
• Queue Mode
• Strict - Services the egress queues in sequential order, transmitting
all traffic in the higher priority queues before servicing lower priority
queues. (This is the default selection.)
• WFQ - Shares bandwidth at the egress ports by specifying a
minimum bandwidth for each queue. Guaranteed bandwidth is first
supplied to each queue, any remaining bandwidth is distributed in a
round-robin fashion.
• WRR - Uses a predefined relative weight for each queue that
determines the percentage of service time the ECN330-switch
services each queue before moving on to the next queue. This
prevents head-of-line blocking that can occur with strict priority
queuing. WRR shares bandwidth at the egress ports by using
scheduling weights 1, 2, 4, 6, 8, 10, 12, 14 for queues 0 through 7
respectively.
• Strict-WFQ - Uses strict priority service on the high-priority queues,
and WFQ on the remaining queues.
• Strict-WRR - Uses strict priority service on the high-priority
queues, and WRR on the remaining queues.
• Strict Queue Split Value (0-7) - Specifies the strict priority queues
used for the Strict-WFQ and Strict-WRR options. This assigns the
specified queue up to the highest priority queue. (Range: 0-7)
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