Interconnect Brocade and Qlogic

[sobo]

Hi
actualy i have two switchs brocade (8port) and two qlogic switchs module for IBM blade (20 port licensing)
I would interconcter each brocade switch with qlogic switchs module for IBM blade to have one switch with 28-port, how I should proceed

|-----------------| |--------------|
| Brocade switch |-----------| Qlogic switch |
| ----------------| | -------------|

|-----------------| |--------------|
| Brocade switch |-----------| Qlogic switch |
| ----------------| | -------------|

thanks