Table Of Contents

U Commands

untagged cos

U Commands

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This chapter describes the Cisco NX-OS quality of service (QoS) commands that begin with U.

untagged cos

To override the class of service (CoS) value for the selected interface, use the untagged cos command. To revert to the defaults, use the no form of this command.

untagged cos cos-value

no untagged cos cos-value

Syntax Description

cos-value

Class of service (CoS) value for untagged frames. Values can range from 1 to 7.

Command Default

None

Command Modes

Interface configuration mode
Subinterface configuration mode
Virtual Ethernet interface configuration mode

Command History

Release	Modification
6.0(2)N1(1)	This command was introduced.

Usage Guidelines

You can use this command on the following interfaces:

•Layer 2 interface

•Layer 3 interface

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Note Use the no switchport command to configure an interface as a Layer 3 interface.

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•Virtual Ethernet interface

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Note Use the feature-set virtualization command to enable the Cisco Adapter Fabric Extender (Adapter-FEX) on the switch. Use the interface vethernet command to configure a virtual Ethernet interface.

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Ethernet frames received with no CoS value are given a CoS value of 0.

On a Cisco Nexus 5548 switch, you can configure a type qos policy map and untagged CoS on the same interface.

Examples

This example shows how to set the CoS value to 4 for untagged frames received on an interface:

switch# configure terminal 

switch(config)# interface ethernet 1/2 

switch(config-if)# untagged cos 4 

This example shows how to set the CoS value to 3 for untagged frames received on a Layer 3 interface:

switch# configure terminal 

switch(config)# interface ethernet 1/5 

switch(config-if)# no switchport 

switch(config-if)# untagged cos 3 

switch(config-if)#

This example shows how to set the CoS value to 5 for untagged frames received on a virtual Ethernet interface:

switch# configure terminal 

switch(config)# feature adapter-fex 

Virtualization Plugin license checked out successfully

Virtualization Plugin extracted successfully

All Virtualization processes enabled successfully

switch(config)# interface vethernet 10 

switch(config-if)# untagged cos 5 

switch(config-if)#

Related Commands

Command	Description
feature-set virtualization	Enables the Cisco Virtual Machine features on the switch.
interface vethernet	Configures a virtual Ethernet interface.
match cos	Sets the CoS value to match for the selected class.
no switchport	Configures an interface as a Layer 3 routed interface.
show interface untagged-cos	Displays the untagged CoS values for interfaces.