With RSP720 : Two Gigabit Ethernet ports (port 1 supports 1-Gbps (SFP); port 2 is configurable for either SFP or 10/ 100/1000BASE-T). With RSP720-10GE: Two X2 based 10GE ports; 2 GE SFP ports and one 10/ 100/1000BASE-T. With SUP2T: Two X2 based 10GE ports; 3 GE SFP ports