Configures the trust state of the port | Cisco Systems OL-4266-08

Chapter 42 Configuring PFC QoS

Configuring PFC QoS

This example shows how to verify the configuration:

Router#		show mls qos map					begin Dscp-cos map
	Dscp-cos map:										(dscp= d1d2)
	d1 :		d2 0	1	2	3 4 5 6 7 8 9
	-------------------------------------
	0	:	00	00	00	00	00	00	00 00	00	01
	1	:	01	01	01	01	01	01	00 02	02	02
	2	:	02	02	02	02	00	03	03 03	03	03
	3	:	03	03	00	04	04	04	04 04	04	04
	4	:	00	05	05	05	05	05	05 05	00	06
	5	:	06	06	06	06	00	06	07 07	07	07
	6	:	07	07	07	07
<	...Output Truncated...					>
Router#

Note In the Dscp-cos map display, the CoS values are shown in the body of the matrix; the first digit of the DSCP value is in the column labeled d1 and the second digit is in the top row. In the example shown, DSCP values 41 through 47 all map to CoS 05.

Configuring the Trust State of Ethernet LAN and OSM Ports

By default, all ports are untrusted. You can configure the port trust state on all Ethernet LAN ports and OSM ports.

Note On non-Gigabit Ethernet 1q4t/2q2t ports, you must repeat the trust configuration in a class map.

To configure the trust state of a port, perform this task:

	Command	Purpose
Step 1
Step 1	Router(config)# interface {{type1 slot/port}	Selects the interface to configure.
	{port-channel number}}
Step 2
Step 2	Router(config-if)# mls qos trust [dscp	Configures the trust state of the port.
	ip-precedence cos2]
	Router(config-if)# no mls qos trust	Reverts to the default trust state (untrusted).
Step 3
Step 3	Router(config-if)# end	Exits configuration mode.
Step 4
Step 4	Router# show queueing interface type1 slot/port	Verifies the configuration.
	include Trust state

1.type = ethernet, fastethernet, gigabitethernet, tengigabitethernet, ge-wan,pos, or atm.

2.Not supported for serial, pos or atm interface types.

When configuring the trust state of a port, note the following information:

•With no other keywords, the mls qos trust command is equivalent to mls qos trust dscp.

•With Release 12.2(18)SXF5 and later releases, you can use the mls qos trust dscp command to enable DSCP-based receive-queue drop thresholds on WS-X6708-10GE ports (see the “Configuring DSCP-Based Queue Mapping” section on page 42-98). To avoid dropping traffic because of inconsistent DSCP values when DSCP-based queue mapping is enabled, configure ports with the mls qos trust dscp command only when the received traffic carries DSCP values that you know to be consistent with network policy.

	Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
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OL-4266-08 specifications

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Cisco Systems OL-4266-08 manual Configuring the Trust State of Ethernet LAN and OSM Ports, 42-90

Models: OL-4266-08

This example shows how to verify the configuration:

Configuring the Trust State of Ethernet LAN and OSM Ports

Command

Configures the trust state of the port.

Reverts to the default trust state (untrusted).

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OL-4266-08 specifications