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Catalyst 3750-X and 3560-X Switch Command Reference
OL-29704-01
Chapter 2 Catalyst 3750-X and 3560-X Switch Cisco IOS Commands
mls qos srr-queue input dscp-map
Usage Guidelines The DSCP assigned at the ingress port selects an ingress or egress queue and threshold.
The drop-threshold percentage for threshold 3 is predefined. It is set to the queue-full state. You can
assign two weighted tail-drop (WTD) threshold percentages to an ingress queue by using the mls qos
srr-queue input threshold global configuration command.
You can map each DSCP value to a different queue and threshold combination, allowing the frame to
follow different behavior.
You can map up to eight DSCP values per command.
Examples This example shows how to map DSCP values 0 to 6 to ingress queue 1 and to threshold 1 with a drop
threshold of 50 percent. It maps DSCP values 20 to 26 to ingress queue 1 and to threshold 2 with a drop
threshold of 70 percent:
Switch(config)# mls qos srr-queue input dscp-map queue 1 threshold 1 0 1 2 3 4 5 6
Switch(config)# mls qos srr-queue input dscp-map queue 1 threshold 2 20 21 22 23 24 25 26
Switch(config)# mls qos srr-queue input threshold 1 50 70
You can verify your settings by entering the show mls qos maps privileged EXEC command.
Related Commands Command Description
mls qos srr-queue input bandwidth Assigns shaped round robin (SRR) weights to an ingress
queue.
mls qos srr-queue input buffers Allocates the buffers between the ingress queues.
mls qos srr-queue input cos-map Maps class of service (CoS) values to an ingress queue
or maps CoS values to a queue and to threshold ID.
mls qos srr-queue input priority-queue Configures the ingress priority queue and guarantees
bandwidth.
mls qos srr-queue input threshold Assigns WTD threshold percentages to an ingress queue.
show mls qos maps Displays QoS mapping information.
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