H3C S6520-EI Series Installation Manual

Contents

27• On an S6520-42QF-EI, S6520-52QF-EI, or S6520-48S-EI switch, the SFP+ ports are groupedby port number in ascending order, starting from one. Every four SFP+ ports form one group.• A port can be bound to an IRF port or operate as a service port. When a port is bound to an IRFport, other ports in the same port group cannot be used as service ports, and vice versa.A common practice is to use one 1/10-GE Ethernet port/SFP+ port group for IRF connections, andbind every two ports in the group to an IRF port for increased bandwidth and availability.Planning the cabling schemeFollow these guidelines when you use cables to connect switches:• S6520-42QF-EI/S6520-52QF-EI switches—Use SFP+/QSFP+ cables or SFP+/QSFP+transceiver modules and fibers.• S6520-48S-EI switches—Use SFP+ cables or SFP+ transceiver modules and fibers.If the IRF member switches are far away from one another, choose the SFP+/QSFP+ transceivermodules with optical fibers. If the IRF member switches are all in one equipment room, choosecategory-6A or above twisted pair/SFP+/QSFP+ cables. For more information about availableSFP+/QSFP+ cables and transceiver modules, see "SFP+ port" and "QSFP+ port."The following subsections describe several H3C recommended IRF connection schemes, and allthese schemes use a ring topology.Connecting the IRF member switches in one rackUse short-haul and long-haul SFP+ cables to connect the IRF member switches (four switches inthis example) in a rack as shown in Figure 32. The switches in the ring topology (see Figure 33) arein the same order as connected in the rack.Figure 32 Connecting the switches in one rack