Cisco SD2008T-NA Configuration Manual page 28

Associating a Fabric Extender to a Fabric Interface
Examples
This example shows how to associate the Fabric Extender to a port channel interface on the parent device:
switch# configure terminal
switch(config)# interface ethernet 1/28
switch(config-if)# channel-group 4
switch(config-if)# no shutdown
switch(config-if)# exit
switch(config)# interface ethernet 1/29
switch(config-if)# channel-group 4
switch(config-if)# no shutdown
switch(config-if)# exit
switch(config)# interface ethernet 1/30
switch(config-if)# channel-group 4
switch(config-if)# no shutdown
switch(config-if)# exit
switch(config)# interface ethernet 1/31
switch(config-if)# channel-group 4
switch(config-if)# no shutdown
switch(config-if)# exit
switch(config)# interface port-channel 4
switch(config-if)# switchport
switch(config-if)# switchport mode fex-fabric
switch(config-if)# fex associate 101
Tip As a best practice, only enter the fex associate command from the port channel interface, not from the
physical interface.
If you try to associate a physical port to a FEX before that physical port is joined to a port channel, the
physical port moves to the err-disable state and the Cisco Nexus 7000 series device does not communicate
with the FEX on that link. You must enter the shutdown command and the no shutdown command on
the Ethernet interface (not the port channel interface) to clear the err-disable state and bring the link up.
(Note that this does not apply if the configuration is performed prior to cabling.)
When adding physical interfaces to port channels, all configurations on the port channel and physical
Note
interface must match.
This example shows how to display the association of the Fabric Extender and the parent device:
switch# show interface port-channel 4 fex-intf
Fabric
Interface
---------------------------------------------------
Po4
Cisco Nexus 2000 Series NX-OS Fabric Extender Software Configuration Guide
18
FEX
Interfaces
Eth101/1/48 Eth101/1/47
Eth101/1/44 Eth101/1/43
Eth101/1/40 Eth101/1/39
Eth101/1/36 Eth101/1/35
Eth101/1/32 Eth101/1/31
Eth101/1/28 Eth101/1/27
Eth101/1/24 Eth101/1/23
Eth101/1/20 Eth101/1/19
Eth101/1/16 Eth101/1/15
Eth101/1/12 Eth101/1/11
Eth101/1/8 Eth101/1/7
Eth101/1/4 Eth101/1/3
Configuring the Fabric Extender
Eth101/1/46 Eth101/1/45
Eth101/1/42 Eth101/1/41
Eth101/1/38 Eth101/1/37
Eth101/1/34 Eth101/1/33
Eth101/1/30 Eth101/1/29
Eth101/1/26 Eth101/1/25
Eth101/1/22 Eth101/1/21
Eth101/1/18 Eth101/1/17
Eth101/1/14 Eth101/1/13
Eth101/1/10 Eth101/1/9
Eth101/1/6 Eth101/1/5
Eth101/1/2 Eth101/1/1
OL-25816-02