SMC Networks SMC7816M, SMC7816VSW 2 Q, S, 14-7, Setting the Service Weight for Traffic Classes

L AYER 2 Q UEUE S ETTINGS
14-7
Web – Click Priority, Queue Mode. Select Strict or WRR, then click Apply.
Figure 14-3 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 14-3, 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
the corresponding traffic priorities). This weight sets the frequency at
which each queue will be polled for service, and subsequently affects the
response time for software applications assigned a specific priority value.
Command Usage
• WRR controls bandwidth sharing at the egress port by de fining
scheduling weights for allocated service priorities. When using WRR,
assign a weight of 1-15 to each of the hardware queues.
• Hybrid mode uses strict priority processing on the high-priority queues,
and WRR on the remaining queues. When using hybrid mode, assign a
weight of zero to indicate a high-priority queue. Any of queues 2 - 7 can
be specified as high-priority queues, but the selected queues must be in
consecutive order, and must all be grouped toward the high end of the
queue list as shown in the following example.
Console(config)#queue mode strict 33-2
Console(config)#exit
Console#show queue mode 33-2
Queue mode: strict
Console#