> And what about Cat6500 and Sup32 ? How much Gbps per slot and > half-duplex or full-duplex ? With a Sup32, the line run on a 16 Gbps shared bus. (No, it's not full duplex. It's a bus. "32" is pure marketing). Since it's shared, any one of the line cards can use all of the bandwidth, if it's available. -A