Cisco Systems 3750E manual Mls qos map dscp-mutation, Mls qos dscp-mutation, 36-44

Chapter 36 Configuring QoS

Configuring Standard QoS

Figure 36-16 DSCP-Trusted State on a Port Bordering Another QoS Domain

QoS Domain 1 QoS Domain 2

IP traffic

Set interface to the DSCP-trusted state.

Configure the DSCP-to-DSCP-mutation map.

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Beginning in privileged EXEC mode, follow these steps to configure the DSCP-trusted state on a port and modify the DSCP-to-DSCP-mutation map. To ensure a consistent mapping strategy across both QoS domains, you must perform this procedure on the ports in both domains:

	Command	Purpose
Step 1
	configure terminal	Enter global configuration mode.
Step 2
	mls qos map dscp-mutation	Modify the DSCP-to-DSCP-mutation map.
	dscp-mutation-name in-dscp to out-dscp	The default DSCP-to-DSCP-mutation map is a null map, which maps
		an incoming DSCP value to the same DSCP value.
		• For dscp-mutation-name, enter the mutation map name. You can
		create more than one map by specifying a new name.
		• For in-dscp, enter up to eight DSCP values separated by spaces.
		Then enter the to keyword.
		• For out-dscp, enter a single DSCP value.
		The DSCP range is 0 to 63.
Step 3
	interface interface-id	Specify the port to be trusted, and enter interface configuration mode.
		Valid interfaces include physical ports.
Step 4
	mls qos trust dscp	Configure the ingress port as a DSCP-trusted port. By default, the port
		is not trusted.
Step 5
	mls qos dscp-mutation	Apply the map to the specified ingress DSCP-trusted port.
	dscp-mutation-name	For dscp-mutation-name, specify the mutation map name created in
		Step 2.
		You can configure multiple DSCP-to-DSCP-mutation maps on an
		ingress port.
Step 6
	end	Return to privileged EXEC mode.
Step 7
	show mls qos maps dscp-mutation	Verify your entries.
Step 8
	copy running-config startup-config	(Optional) Save your entries in the configuration file.

	Catalyst 3750-E and 3560-E Switch Software Configuration Guide
36-44	OL-9775-02