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C
ONFIGURING
THE
S
WITCH
3-210
predefined relative weight for each queue that determines the percentage
of service time the switch services each queue before moving on to the
next queue. This prevents the head-of-line blocking that can occur with
strict priority queuing.
Command Attributes
• WRR - Weighted Round-Robin shares bandwidth at the egress ports
by using scheduling weights 1, 2, 4, 6, 8, 10, 12, 14 for queues 0 through
7 respectively. (This is the default selection.)
• Strict - Services the egress queues in sequential order, transmitting all
traffic in the higher priority queues before servicing lower priority
queues.
Web – Click Priority, Queue Mode. Select Strict or WRR, then click Apply.
Figure 3-86 Queue Mode
CLI – The following sets the queue mode to strict priority service mode.
Setting the Service Weight for Traffic Classes
This switch uses the Weighted Round Robin (WRR) algorithm to
determine the frequency at which it services each priority queue. As
described in “Mapping CoS Values to Egress Queues” on page 3-208, the
traffic classes are mapped to one of the eight egress queues provided for
each port. You can assign a weight to each of these queues (and thereby to
Console(config)#queue mode strict 4-253
Console(config)#exit
Console#show queue mode 4-257
Queue mode: strict
Console#