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.

FCX-I and FCX-E devices can only be used for stacking if they have an optional 10 Gbps SFP+ module installed in the front panel. These devices do not have stacking ports on the rear panels.

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.

The automatic setup process does not work for FCX devices that do not contain the default port information in their clean unit configurations. An FCX "clean unit" may contain a default port configuration and still be considered a clean unit. To preserve this state, do not execute the write memory command on the unit before you build the stack. (The write memory command adds a startup-config, and the device is no longer a clean unit.)