The interconnect modules dictates how you can mix and mash all together. They're looking like mighty interesting beasts those C3000 / C7000. And it kind of tells why the blades tend to be dirt-cheap on their own (they really, really, really want to be paired with the enclosure and the interconnect modules).
The Interconnect bays are occupied by 4 HP 1Gb Ethernet Pass-Thru modules and two Brocade 4/12 San Switch for HP c-Class BladeSystem. Due to a change from a fibre SAN to an ISCI SAN, I need to add additional NICs to most of the servers in the enclosure. The Brocade modules will remain in use until the data migration is complete.