Cisco Catalyst 3750 Metro, Command Reference Manual

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Catalyst 3750 Metro Switch Command Reference
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Chapter 2 Catalyst 3750 Metro Switch Cisco IOS Commands
mls qos srr-queue output dscp-map
Note The egress queue-set default settings are suitable for most situations. You should change them only when
you have a thorough understanding of the queues and if these settings do not meet your quality of service
(QoS) solution.
You can assign two weighted tail-drop (WTD) threshold percentages to an egress queue-set by using the
mls qos queue-set output qset-id 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 a port to queue-set 1. It maps DSCP values 0 to 3 to egress queue 1 and
to threshold ID 1. It configures the drop thresholds for queue 1 to 50 and 70 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 srr-queue output dscp-map queue 1 threshold 1 0 1 2 3
Switch(config)# mls qos queue-set output 1 threshold 1 50 70 100 200
Switch(config)# interface fastethernet1/0/1
Switch(config-if)# queue-set 1
You can verify your settings by entering the show mls qos maps , the show mls qos interface
[ interface-id ] buffers , or the show mls qos queue-set privileged EXEC command.
Related Commands Command Description
mls qos srr-queue output cos-map Maps class of service (CoS) values to an egress queue or maps
CoS values to a queue and to a threshold ID.
mls qos queue-set output threshold Configures the WTD thresholds, guarantees the availability of
buffers, and configures the maximum memory allocation to a
queue-set.
queue-set Maps a port to a queue-set.
show mls qos interface buffers Displays buffer allocation information.
show mls qos maps Displays QoS mapping information.
show mls qos queue-set Displays settings for the queue-set.