Cisco IE-3000-8TC Software Configuration Manual page 722

Software configuration guide

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Configuring Standard QoS

Each threshold value is a percentage of the queues allocated buffers, which you specify by using the mls

qos queue-set output qset-id buffers allocation1 ... allocation4 global configuration command. The

queues use WTD to support distinct drop percentages for different traffic classes.

The egress queue default settings are suitable for most situations. You should change them only when

you have a thorough understanding of the egress queues and if these settings do not meet your QoS

Beginning in privileged EXEC mode, follow these steps to configure the memory allocation and to drop

thresholds for a queue-set. This procedure is optional.

configure terminal

mls qos queue-set output qset-id

buffers allocation1 ... allocation4

Cisco IE 3000 Switch Software Configuration Guide

Enter global configuration mode.

Allocate buffers to a queue-set.

By default, all allocation values are equally mapped among the four

queues (25, 25, 25, 25). Each queue has 1/4 of the buffer space.

For qset-id, enter the ID of the queue-set. The range is 1 to 2. Each

port belongs to a queue-set, which defines all the characteristics of

the four egress queues per port.

For allocation1 ... allocation4, specify four percentages, one for each

queue in the queue-set. For allocation1, allocation3, and allocation4,

the range is 0 to 99. For allocation2, the range is 1 to 100 (including

the CPU buffer).

Allocate buffers according to the importance of the traffic; for example,

give a large percentage of the buffer to the queue with the highest-priority

Configuring QoS

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Troubleshooting