Associating a Fabric Extender to a Fabric Interface
A FEX is connected to its parent device through physical Ethernet interfaces or a port channel. By default,
the parent device does not allow the attached Fabric Extender to connect until it has been assigned a FEX
number and is associated with the connected interface.
The Fabric Extender may connect to the switch through a number of separate physical Ethernet interfaces
or one port channel interface.
Note
You must enable the Fabric Extender features with the feature fex command before you can configure
and use a Fabric Extender that is connected to the parent switch.
Note
Associating a Fabric Extender to an Ethernet Interface
Before You Begin
Ensure that you have enabled the Fabric Extender feature.
Procedure
PurposeCommand or Action
Enters global configuration mode.configure terminal
Example:
switch# configure terminal
switch(config)#
Step 1
Specifies an Ethernet interface to configure.
interface ethernet slot/port
Step 2
Example:
switch(config)# interface ethernet 1/40
switch(config)#
If this is a 10G breakout port, the
slot/port syntax is QSFP-module/port.
Note
Sets the interface to support an external Fabric
Extender.
switchport mode fex-fabric
Example:
switch(config-if)# switchport mode
fex-fabric
switch(config-if)#
Step 3
Associates the FEX number to the Fabric
Extender unit attached to the interface. The
range of the FEX number is from 100 to 199.
fex associate FEX-number
Example:
switch(config-if)# fex associate 101
switch#
Step 4
Cisco Nexus 6000 Series NX-OS Layer 2 Switching Configuration Guide, Release 7.x
165
Configuring the Fabric Extender
Associating a Fabric Extender to a Fabric Interface
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