Configuring an FCX traditional stack
FCX devices cannot be intermixed with non-FCX devices, and FCX devices have additional potential stacking ports.
Every FCX-S and FCXS-F device contains two default 16 Gbps stacking ports on the rear panel and two 10 Gbps ports on the front panel that can also be used as stacking ports.
An FCX traditional stack may contain up to eight 24-port and 48-port devices, using any combination of the rear panel stacking ports and the front panel optional stacking ports. For FCX-S and FCXS-F devices, to use ports other than the factory-default 16 Gbps ports, you must define the ports for each device in the runtime configuration. You can also configure the 16 Gbps ports to operate as 10 Gbps ports.