How to Configure the N9K-C93108TC-FX3P Switch as a FEX extend Switch ?

[id404]

In this web page https://www.cisco.com/c/dam/en/us/td/docs/Website/datacenter/fexmatrix/fexmatrix.html, we found that N9K-C93108TC-FX3P is supported as N9K-C93180YC-FX3 line card. 

Is there any configuration information about it? I only found  Nexus 2000 Series NX-OS Fabric Extender Configuration Guide

[balaji.bandi]

If you are looking FEX config on nexus 9K, it should be same as FEX config - there is nothing changed :

have a look config guide :

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/93x/fex/configuration/guide/b-cisco-nexus-2000-nx-os-fabric-extender-configuration-guide-for-nexus-9000-switches-93x/b-cisco-nexus-2000-nx-os-fabric-extender-configuration-guide-f...

[Carlos Duarte · Accepted solution]

Yes it is possible for the C93108TC-FX3P model to be run as a FEX , which will operate as a standard N2K FEX . Also the N9K-C93180YC-FX3/FX3S has the same feature.

To turn those specific models to run fex mode :

switch(config)# wr erase

switch(config)# no boot nxos (tells device not to startup with a NX-OS image )

switch(config)# copy running-configuration startup-configuration

switch(config)# boot fex (sets the fex as the boot variable) 

switch(config)#reload

(Password will typically be admin , once the device boots in FEX mode)

You can also turn the device running as FEX back to NX-OS software running device.

You can use this link for more information:

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/93x/fex/configuration/guide/b-cisco-nexus-2000-nx-os-fabric-extender-configuration-guide-for-nexus-9000-switches-93x/m-software-fex-mode-configuration.html

HTH

[John.Mayer]

Hi all

I know it's an old thread, but can I ask you a question in terms of FEX interfaces between N9K in FEX mode and N9K in normal NXOS

For the physical connectivity perspective, can we use the 40G interfaces on N9K-FEX for FEX-links? And do all breakout cables work?

[liaoxiaoyan]

The 40G interface can be used as a fex-link on the N9K-Fex. Our production environment uses two QSFP-4X10G-AOC5M=. The N9K-FEX is connected to two 40G interfaces and the N9K is connected to four 10G interfaces.