Cisco Systems 3750E manual Debug auto qos, Cdp enable, Auto qos voip trust, Show auto qos, 36-31

Chapter 36 Configuring QoS

Configuring Auto-QoS

Note	You should not configure any standard QoS commands before entering the auto-QoS commands. You
	can fine-tune the QoS configuration, but we recommend that you do so only after the auto-QoS
	configuration is completed.
	Beginning in privileged EXEC mode, follow these steps to configure the switch at the edge of the QoS
	domain to prioritize the VoIP traffic over all other traffic:
	Command	Purpose
Step 1
	debug auto qos	Enable debugging for auto-QoS. When debugging is enabled, the
		switch displays the QoS configuration that is automatically
		generated when auto-QoS is enabled.
Step 2
	configure terminal	Enter global configuration mode.
Step 3
	cdp enable	Enable CDP globally. By default, it is enabled.
Step 4
	interface interface-id	Specify the switch port connected to the Cisco IP Phone, and enter
		interface configuration mode.
Step 5
	auto qos voip cisco-phone	Enable auto-QoS on the port, and specify that the port is connected
		to a Cisco IP Phone.
		The QoS labels of incoming packets are trusted only when the
		Cisco IP Phone is detected.
Step 6
	exit	Return to global configuration mode.
Step 7
		Repeat Steps 4 to 6 for as many ports as are connected to the Cisco
		IP Phone.
Step 8
	interface interface-id	Specify the switch port identified as connected to a trusted switch
		or router, and enter interface configuration mode. See
		Figure 36-14.
Step 9
	auto qos voip trust	Enable auto-QoS on the port, and specify that the port is connected
		to a trusted router or switch.
Step 10
	end	Return to privileged EXEC mode.
Step 11
	show auto qos	Verify your entries.
		This command displays the auto-QoS command on the interface
		on which auto-QoS was enabled. You can use the show
		running-configprivileged EXEC command to display the
		auto-QoS configuration and the user modifications.
		For information about the QoS configuration that might be
		affected by auto-QoS, see the “Displaying Auto-QoS Information”
		section on page 26-12.
Step 12
	copy running-config	Save the auto qos voip interface configuration commands and the
	startup-config	generated auto-QoS configuration in the configuration file.

	Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-02		36-31