SMC Networks 6152PL2 FICHE, Management Manual

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Class of Service Configuration
3-267
3
weighting. 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 with default values of 1, 2, 4, 8 for queues 0 through 3,
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 3-154 Queue Mode
CLI – The following sets the queue mode to strict priority service mode.
Displaying 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 3-265, the traffic classes are mapped to one of
the four egress queues provided for each port. This weight sets the limit for the
number of packets the switch will transmit each time the queue is serviced, and
subsequently affects the response time for software applications assigned a specific
priority value.
Note:
This switch does not allow the queue service weights to be set. The weights are
fixed as
1, 2, 4, 8, for queues 0 through 3 respectively.
Command Attributes
• WRR Setting Table
18
– Displays a list of weights for each traffic class (i.e., queue).
• Weight Value – Displays the weight for each traffic class.
Console(config)#queue mode strict 4-363
Console(config)#exit
Console#show queue mode
4-366
Queue mode: strict
Console#
18. CLI shows Queue ID.