40Identifying physical IRF ports on the member switchesIdentify the physical IRF ports on the member switches according to your topology and connectionscheme.Table 7 shows the physical ports that can be used for IRF connection and the port use restrictions.Table 7 Physical IRF port requirementsChassis Candidate physical IRF ports RequirementsS5560X-34S-EIS5560X-54S-EI• Four SFP+ ports on the front panel• Two QSFP+ ports on the rear panel• All physical ports to be bound to anIRF port must have the same datarate.• Physical ports on interface cardsand the front panel can be bound tothe same IRF port.• If a QSFP+ port is split into fourvirtual SFP+ ports, the QSFP+ portcannot be used as a physical IRFport.• When a10G/5G/2.5G/1000BASE-Tautosensing Ethernet port and a5G/2.5G/1000BASE-Tautosensing Ethernet portconnects to establish an IRF link,both the ports operate in 5G mode.S5560X-30C-EIS5560X-30C-PWR-EIS5560X-54C-EIS5560X-54C-PWR-EIS5560X-30F-EIS5560X-54F-EI• Four fixed SFP+ ports on the frontpanel• Ports on the interface cards on therear panel:{ 1/10GBASE-T autosensingEthernet ports{ 5G/2.5G/1000BASE-Tautosensing Ethernet ports{ 10G/5G/2.5G/1000BASE-Tautosensing Ethernet ports{ SFP+ ports{ SFP28 ports{ QSFP+ portsPlanning the cabling schemeThe cables available for connecting two peer IRF physical ports vary by port type:• 1/10GBASE-T autosensing Ethernet ports, 5G/2.5G/1000BASE-T autosensing Ethernetports, or 10G/5G/2.5G/1000BASE-T autosensing Ethernet ports—For the available cables,see the relevant ports in "Appendix C Ports and LEDs."• SFP+ ports—SFP+ transceiver modules and optical fiber or SFP+ cable. For the availabletransceiver modules and cables, see SFP+ port in "Appendix C Ports and LEDs."• SFP28 ports—SFP28 transceiver modules and optical fiber or SFP28 cable. For the availabletransceiver modules and cables, see SFP28 port in "Appendix C Ports and LEDs."• QSFP+ ports—QSFP+ transceiver modules and optical fiber or QSFP+ cable. For theavailable transceiver modules and cables, see QSFP+ port in "Appendix C Ports and LEDs."For a short-distance IRF connection in an equipment room, use a twisted-pair cable, SFP+ cable,SFP28 cable, or QSFP+ cable.For a long-distance IRF connection, use SFP+/SFP28/QSFP+ transceiver modules and opticalfibers.The following subsections describe several H3C recommended IRF connection schemes. All theseschemes use a ring topology.IMPORTANT:In these schemes, all physical IRF ports are located on the same side. If physical IRF ports are ondifferent sides, you must measure the distance between them to select an appropriate cable.