Step 3 switch(config)# module 1 transceiver-frequency x2-fc
Configures (default) the link to function as X2 FC.
This feature is not supported in other than MDS 9134 modules. In MDS 9134 modules, the 10-Gigabit Ethernet
ports must be in down state when you configure the X2 transceiver frequency.
Note
Cisco MDS 9000 Series Fabric Configuration Guide, Release 8.x
208
Configuring Dense Wavelength Division Multiplexing
Configuring X2 DWDM Transceiver Frequency