Below is the command syntax to enable the fex configurations mode. First you will have to run “service internal” command, it will enable the hidden commands. However, do not forget to turn off the commands after making the changes using “no service internal”.
6800-1#test platform software console fex 110 enable timeout 60 <<<<< This command will enable configuration mode on fex 110 for 60 minutes
Once done with the changes on the fex110, run the following command on the parent switch to turn off the service internal mode:
6800-1(config)#no service internal