SMC Networks 100BASE-TX Setting the Service Weight for Traffic Classes, Selecting the Queue Mode

3 Configuring the Switch

Command Attributes

•WRR - Weighted Round-Robin shares bandwidth at the egress ports by using scheduling weights 1, 2, 4, 6 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 3-74. Selecting the Queue Mode

CLI – The following sets the queue mode to strict priority service mode.

Console(config)#queue mode strict	4-164
Console(config)#exit
Console#show queue mode	4-167
Queue mode: strict
Console#

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 3-122,the traffic classes are mapped to one of the four 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 Attributes

•WRR Setting Table* – Displays a list of weights for each traffic class (i.e., queue).

•Weight Value – Set a new weight for the selected traffic class. However, note that Queue 0 is fixed at a weight of 1, and cannot be configured. (Range: 1-31)

*CLI shows Queue ID.

3-124