F Commands

This chapter describes the Cisco NX-OS virtual port channel (vPC) commands that begin with F.

feature adapter-fex

To enable Adapter Fabric Extender (Adapter-FEX), use the feature adapter-fex command. To disable Adapter-FEX, use the no form of this command.

feature adapter-fex

no feature adapter-fex

 
Syntax Description

This command has no arguments or keywords.

 
Command Default

Disabled

 
Command Modes

Global configuration mode

 
Command History

Release
Modification

5.0(3)N1(1)

This command was introduced.

 
Usage Guidelines

Before you disable this feature on the switch, make sure you remove all virtual Ethernet interface configurations on the switch and change the port mode to access by using the switchport mode access command. If you attempt to disable the Adapter-FEX feature with virtual Ethernet interface configurations enabled, the switch returns an error message.

Examples

This example shows how to enable the Adapter-FEX on the switch:

switch(config)# feature adapter-fex
Virtualization Plugin license checked out successfully
Virtualization Plugin extracted successfully
All Virtualization processes enabled successfully
switch(config)#
 

This example shows how to disable Adapter-FEX on the switch:

switch(config)# no feature adapter-fex
Disabled feature adapter-fex successfully.
You should save the configuration and Reload.
switch(config)#
 

This example shows the error message that appears when you attempt to disbale NIV on a switch with virtual Ethernet interface configurations enabled:

switch(config)# no feature niv
Disabling of NIV failed.veth and vntag configs found
Shutdown all veths and Remove them.
Change ports with 'switchport mode vntag' to 'switchport mode access'.
switch(config)#
 

 
Related Commands

Command
Description

interface ethernet

Configures an Ethernet interface.

port-profile

Configures a port profile.

show feature

Displays whether or not Adapter-FEX is enabled on the switch.

switchport mode

Configures the interface as a nontrunking nontagged single-VLAN Ethernet interface.

feature vpc

.i.feature vpc command;

To enable a virtual port channel (vPC), which allows links that are physically connected to two different Cisco Nexus devices to appear as a single port channel to a third device, use the feature vpc command. To disable vPC on the switch, use the no form of this command.

feature vpc

no feature vpc

 
Syntax Description

This command has no arguments or keywords.

 
Command Default

Disabled

 
Command Modes

Global configuration mode

 
Command History

Release
Modifications

6.0(2)N1(1)

This command was introduced.

 
Usage Guidelines

In a vPC configuration, the third device can be a Cisco Nexus 2000 Series Fabric Extender, switch, server, or any other networking device.

Examples

This example shows how to enable vPC on the switch:

switch(config)# feature vpc
 

 
Related Commands

Command
Description

show vpc

Displays the vPC configuration status.

show feature

Displays whether or not vPC is enabled on the switch.