Cisco Systems 3750E Mls qos srr-queue output dscp-map, Mls qos srr-queue output cos-map, 36-77

Chapter 36 Configuring QoS

Configuring Standard QoS

Beginning in privileged EXEC mode, follow these steps to map DSCP or CoS values to an egress queue and to a threshold ID. This procedure is optional.

	Command	Purpose
Step 1
	configure terminal	Enter global configuration mode.
Step 2
	mls qos srr-queue output dscp-map	Map DSCP or CoS values to an egress queue and to a threshold ID.
	queue queue-id threshold threshold-id	By default, DSCP values 0–15 are mapped to queue 2 and threshold 1.
	dscp1...dscp8
		DSCP values 16–31 are mapped to queue 3 and threshold 1. DSCP values
	or	32–39 and 48–63 are mapped to queue 4 and threshold 1. DSCP values
	mls qos srr-queue output cos-map	40–47 are mapped to queue 1 and threshold 1.
	queue queue-id threshold threshold-id	By default, CoS values 0 and 1 are mapped to queue 2 and threshold 1.
	cos1...cos8	CoS values 2 and 3 are mapped to queue 3 and threshold 1. CoS values 4,
		6, and 7 are mapped to queue 4 and threshold 1. CoS value 5 is mapped to
		queue 1 and threshold 1.
		• For queue-id, the range is 1 to 4.
		• For threshold-id, the range is 1 to 3. The drop-threshold percentage
		for threshold 3 is predefined. It is set to the queue-full state.
		• For dscp1...dscp8, enter up to eight values, and separate each value
		with a space. The range is 0 to 63.
		• For cos1...cos8, enter up to eight values, and separate each value with
		a space. The range is 0 to 7.
Step 3
	end	Return to privileged EXEC mode.
Step 4
	show mls qos maps	Verify your entries.
		The DSCP output queue threshold map appears as a matrix. The d1
		column specifies the most-significant digit of the DSCP number; the d2
		row specifies the least-significant digit in the DSCP number. The
		intersection of the d1 and the d2 values provides the queue ID and
		threshold ID; for example, queue 2 and threshold 1 (02-01).
		The CoS output queue threshold map shows the CoS value in the top row
		and the corresponding queue ID and threshold ID in the second row; for
		example, queue 2 and threshold 2 (2-2).
Step 5
	copy running-config startup-config	(Optional) Save your entries in the configuration file.

To return to the default DSCP output queue threshold map or the default CoS output queue threshold map, use the no mls qos srr-queue output dscp-mapor the no mls qos srr-queue output cos-mapglobal configuration command.

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

	Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-02		36-77