I know that with the WS-C4507R+E supervisor, you can use the WS-X4712-SFP+E Catalyst 4500 E-Series 12-Port 10GbE (SFP+) line card. The SFP+ slots can use either 1 Gb SFP or 10 Gb SFP+ transceivers.

There is a caveat: the ASICs on the line card each control three ports, and the ASICs can only handle 12 Gb each. This gives you four ASICs per the 12 ports on the line card, and that will give you the full slot bandwidth. You could use on 10 Gb and two 1 Gb ports for each of the three ports for a full line rate. If you use three 10 Gb ports on the ASIC, you will drop some traffic if the traffic on the ASIC exceeds 12 Gb.

I know that with the WS-C4507R+E supervisor, you can use the WS-X4712-SFP+E Catalyst 4500 E-Series 12-Port 10GbE (SFP+) line card. The SFP+ slots can use either 1 Gb SFP or 10 Gb SFP+ transceivers.

There is a caveat: the ASICs on the line card each control three ports, and the ASICs can only handle 12 Gb each. This gives you four ASICs per the 12 ports on the line card, and that will give you the full slot bandwidth. You could use one 10 Gb and two 1 Gb ports for each of the three ports per ASIC for a full line rate. If you use three 10 Gb ports on the ASIC, you will drop some traffic if the traffic on the ASIC exceeds 12 Gb.