Cisco 3560G 48TS Software Configuration Guide - Page 580
thresholds expressed as a percentage of the queue's allocated, memory. The range is 1 to 400 percent.
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Configuring Standard QoS Chapter 28 Configuring QoS Beginning in privileged EXEC mode, follow these steps to configure the memory allocation and drop thresholds for a queue-set. This procedure is optional. Step 1 Step 2 Command configure terminal mls qos queue-set output qset-id buffers allocation1 ... allocation4 Step 3 mls qos queue-set output qset-id threshold queue-id drop-threshold1 drop-threshold2 reserved-threshold maximum-threshold Step 4 interface interface-id Step 5 queue-set qset-id Step 6 end Purpose 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. The range is 0 to 100. Separate each value with a space. 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 traffic. Configure the WTD thresholds, guarantee the availability of buffers, and configure the maximum memory allocation for the queue-set (four egress queues per port). By default, the WTD thresholds for queues 1, 3, and 4 are set to 100 percent. The thresholds for queue 2 are set to 50 percent. The reserved thresholds for queues 1, 3, and 4 are set to 50 percent. The reserved threshold for queue 2 is set to 100 percent. The maximum thresholds for all queues are set to 400 percent. • For qset-id, enter the ID of the queue-set specified in Step 2. The range is 1 to 2. • For queue-id, enter the specific queue in the queue-set on which the command is performed. The range is 1 to 4. • For drop-threshold1 drop-threshold2, specify the two WTD thresholds expressed as a percentage of the queue's allocated memory. The range is 1 to 400 percent. • For reserved-threshold, enter the amount of memory to be guaranteed (reserved) for the queue expressed as a percentage of the allocated memory. The range is 1 to 100 percent. • For maximum-threshold, enable a queue in the full condition to obtain more buffers than are reserved for it. This is the maximum memory the queue can have before the packets are dropped if the common pool is not empty. The range is 1 to 400 percent. Specify the port of the outbound traffic, and enter interface configuration mode. Map the port to a queue-set. For qset-id, enter the ID of the queue-set specified in Step 2. The range is 1 to 2. The default is 1. Return to privileged EXEC mode. 28-58 Catalyst 3560 Switch Software Configuration Guide 78-16156-01
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