Yes. We have a customer that swap out their old IB switches with two new one, AND expand the cluster. At the end, we used a mixture of copper (nodes closer to the switch) and fiber (nodes six cabinet away) to the same switches. Keith
Hi,   Does anybody know whether or not we can use fiber and copper cables for an Infiniband switch such as Intel/Qlogic 12300 series to form an Isilon cluster? I found CABLE, SWITCHES, and COMPATIBLE NODES table (P.53-54 of ISILON SUPPORTABILITY & COMPATIBILITY GUIDE). I knew some IB switch supported both copper and fiber cable but I am not sure whether or not we can use both types of cable at the same time for an IB switch. For example, can we use 30 copper cables and 6 fiber cables for an IB switch and form an Isilon cluster? Or do we have to decide which, copper or fiber, type of cable to use for forming an Isilon cluster?  Thank you,
Mixture of Copper and Fiber cables in an Infiniband switch