hi victor,
i have attached 3 screen shots of the FC module.basically "bay x" means the number of the blade and "ext x" means the ports connected to a san storage or switch.
it has a management or sup interface that holds it's ip but the communication to the module is routed through the blade management module which have a different ip, in this case is 172.16.4.60
Best Regards,
Lindeamon