Cisco Systems 3750E manual Service-policy policy-map-name, 36-59

Chapter 36 Configuring QoS

Configuring Standard QoS

	Command	Purpose
Step 17
	trust [cos dscp ip-precedence]	Configure the trust state, which QoS uses to generate a CoS-based or
		DSCP-based QoS label.
		Note This command is mutually exclusive with the set command
		within the same policy map. If you enter the trust command,
		omit Step 18.
		By default, the port is not trusted. If no keyword is specified when the
		command is entered, the default is dscp.
		The keywords have these meanings:
		• cos—QoS derives the DSCP value by using the received or default
		port CoS value and the CoS-to-DSCP map.
		• dscp—QoS derives the DSCP value by using the DSCP value from
		the ingress packet. For non-IP packets that are tagged, QoS derives
		the DSCP value by using the received CoS value; for non-IP
		packets that are untagged, QoS derives the DSCP value by using
		the default port CoS value. In either case, the DSCP value is
		derived from the CoS-to-DSCP map.
		• ip-precedence—QoS derives the DSCP value by using the IP
		precedence value from the ingress packet and the
		IP-precedence-to-DSCP map. For non-IP packets that are tagged,
		QoS derives the DSCP value by using the received CoS value; for
		non-IP packets that are untagged, QoS derives the DSCP value by
		using the default port CoS value. In either case, the DSCP value is
		derived from the CoS-to-DSCP map.
		For more information, see the “Configuring the CoS-to-DSCP Map”
		section on page 36-63.
Step 18 set {dscp new-dscpip precedence		Classify IP traffic by setting a new value in the packet.
	new-precedence}	• For dscp new-dscp, enter a new DSCP value to be assigned to the
		classified traffic. The range is 0 to 63.
		• For ip precedence new-precedence,enter a new IP-precedence
		value to be assigned to the classified traffic. The range is 0 to 7.
Step 19
	service-policy policy-map-name	Specify the interface-level policy-map name (from Step 10) and
		associate it with the VLAN-level policy map.
		If the VLAN-level policy map specifies more than one class, each class
		can have a different service-policypolicy-map-namecommand.
Step 20
	exit	Return to policy-map configuration mode.
Step 21
	exit	Return to global configuration mode.
Step 22
	interface interface-id	Specify the SVI to which to attach the hierarchical policy map, and
		enter interface configuration mode.

	Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-02		36-59