Examples: Configuring Egress Queue Characteristics - Cisco Catalyst 2960 series Configuration Manual

Configuration Examples for QoS
This example shows how to allocate 60 percent of the buffer space to ingress queue 1 and 40 percent of the
buffer space to ingress queue 2:
Switch(config)# mls qos srr-queue input buffers 60 40
This example shows how to assign the ingress bandwidth to the queues. Priority queueing is disabled, and
the shared bandwidth ratio allocated to queue 1 is 25/(25+75) and to queue 2 is 75/(25+75):
Switch(config)# mls qos srr-queue input priority-queue 2 bandwidth 0
Switch(config)# mls qos srr-queue input bandwidth 25 75
This example shows how to assign the ingress bandwidths to the queues. Queue 1 is the priority queue with
10 percent of the bandwidth allocated to it. The bandwidth ratios allocated to queues 1 and 2 is 4/(4+4). SRR
services queue 1 (the priority queue) first for its configured 10 percent bandwidth. Then SRR equally shares
the remaining 90 percent of the bandwidth between queues 1 and 2 by allocating 45 percent to each queue:
Switch(config)# mls qos srr-queue input priority-queue 1 bandwidth 10
Switch(config)# mls qos srr-queue input bandwidth 4 4
Related Topics
Allocating Buffer Space Between the Ingress Queues, on page 614
Queueing and Scheduling on Ingress Queues, on page 556
Allocating Bandwidth Between the Ingress Queues, on page 616
Queueing and Scheduling on Ingress Queues, on page 556
Configuring the Ingress Priority Queue
Queueing and Scheduling on Ingress Queues, on page 556

Examples: Configuring Egress Queue Characteristics

This example shows how to map a port to queue-set 2. It allocates 40 percent of the buffer space to egress
queue 1 and 20 percent to egress queues 2, 3, and 4. It configures the drop thresholds for queue 2 to 40 and
60 percent of the allocated memory, guarantees (reserves) 100 percent of the allocated memory, and configures
200 percent as the maximum memory that this queue can have before packets are dropped:
Switch(config)# mls qos queue-set output 2 buffers 40 20 20 20
Switch(config)# mls qos queue-set output 2 threshold 2 40 60 100 200
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# queue-set 2
This example shows how to map DSCP values 10 and 11 to egress queue 1 and to threshold 2:
Switch(config)# mls qos srr-queue output dscp-map queue 1 threshold 2 10 11
This example shows how to configure bandwidth shaping on queue 1. Because the weight ratios for queues
2, 3, and 4 are set to 0, these queues operate in shared mode. The bandwidth weight for queue 1 is 1/8, which
is 12.5 percent:
Switch(config)# interface gigabitethernet2/0/1
Switch(config-if)# srr-queue bandwidth shape 8 0 0 0
This example shows how to configure the weight ratio of the SRR scheduler running on an egress port. Four
queues are used, and the bandwidth ratio allocated for each queue in shared mode is 1/(1+2+3+4), 2/(1+2+3+4),
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