FEX troubleshooting
If you have extended your fabric with a Fabric Extender (FEX), you can check the connectivity and status from the leaf node.
How to do it...
- Once you have connected to the leaf that the FEX attaches to, you can run these commands:
sh fex sh fex detail
The first command will show the state, model, and serial number. The second command will show the same information, along with the port states.
- If we wanted to dig deeper, we could check the link between the FEX and the leaf, using the
show fex transceiver command,  which will show us the hardware properties of the transceiver. We can also look at the environmental data (such as temperature and CPU usage) using theshow environment fex command. While we would hope that the same information would be readable through SNMP and already available to us in our monitoring platform, we may be in a situation where that information is not flowing (such as the CPU being overworked).
There's more...
Other useful commands are show...
