Cisco Systems WSC4500X16SFP Manual De Usuario

This example shows how to verify the configuration:

Switch# show qos | begin QoS is vlan-based 

QoS is vlan-based on the following interfaces:

    Fa5/42

Switch# 

When a layer 2 interface is configured with VLAN-based QoS, and if a packet is received on the port for 
a VLAN on which there is no QoS policy, then the QoS policy attached to the port, if any is used. This 
applies for both Input and Output QoS policies.

This command configures the trust state of interfaces. By default, all interfaces are untrusted. 

To configure the trust state of an interface, perform this task:

When configuring the trust state of an interface, note the following:

You can use the no qos trust command to set the interface state to untrusted.

For traffic received on an ingress interface configured to trust CoS using the qos trust cos command, 
the transmit CoS is always the incoming packet CoS (or the ingress interface default CoS if the 
packet is received untagged). 

When the interface trust state is not configured to trust dscp using the qos trust dscp command, the 
security and QoS ACL classification will always use the interface DSCP and not the incoming 
packet DSCP.

This example shows how to configure Gigabit Ethernet interface 1/1 with the trust cos keywords:

Switch# configure terminal 

Enter configuration commands, one per line.  End with CNTL/Z.

Switch(config)# interface gigabitethernet 1/1 

Switch(config-if)# qos trust cos 

Switch(config-if)# end 

Switch# 

This example shows how to verify the configuration:

Switch# show qos interface gigabitethernet 1/1 | include trust 

  Trust state: trust COS

Switch# 

Switch(config)# interface {vlan 

vlan_ID | 

{fastethernet | gigabitethernet} 

slot/interface

 | 

number} 

Selects the interface to configure.

Switch(config-if)# [no] qos trust [dscp | cos] 

Configures the trust state of an interface.

Use the no keyword to clear a configured value and 
return to the default.

Switch(config-if)# end 

Exits configuration mode.

Switch# show qos 

Verifies the configuration.