Expert told me that ethernet internal Swich in Gen6 also does not support cascade configuration ...  thanks ! aya
HI experts ....  I found  Trunk IB switches Isilon Cluster and found IB Switch cannot be added when current switch running out of ports ...  What about ethernet internal Swich inGen6 .Would customer need to replace more ports switch when cluster added more nodes?  thanks ! aya 
Gen6 ethernet Internal switch