H3C Technologies H3C S5800 Series Switches - Manual (Page 92)

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optical fibers. If the IRF member switches are all in one equipment room, choose SFP+ cables or twisted
pair cables.
Table 35 lists the SFP+ transceivers and SFP+ cables available for IRF connections.
Table 35 SFP+ transceiver modules and SFP+ cables available for IRF connections
Transceiver/cable
Central
wavelength Connector Fiber
Max transmission
distance
10 GE SFP+ transceiver
SFP-XG-SX-MM850-A 850 nm LC
50/125 μm multimode
optical fiber
300 m (984.3 ft.)
SFP-XG-LX220-MM1310 1310 nm LC
62.5/125 μm multimode
optical fiber
220 m (721.8 ft.)
SFP-XG-LX-SM1310 1310 nm LC
9/125 μm single mode
optical fiber 10 km (about 6.21
mi)
10 GE SFP+ cable
LSWM1STK N/A N/A SFP+ cable 0.65 m (2.1 ft)
LSWM2STK N/A N/A SFP+ cable 1.2 m (3.9 ft)
LSWM3STK N/A N/A SFP+ cable 3 m (9.8 ft)
LSTM1STK N/A N/A SFP+ cable 5 m (16.4 ft)
LSTM2STK N/A N/A SFP+ cable 7 m (22.97 ft)
The following subsections describe several H3C recommended IRF connection schemes. All these
schemes use a ring topology.
IMPORTANT:
In these schemes, all physical IRF ports are located on the same side. If physical IRF ports are on different
sides, you must measure the distance between them to select an appropriate cable.
Connecting the IRF member switches in one rack
Use short-haul and long-haul SFP+ cables to connect the IRF member switches (10 switches in this
example) in a rack as shown in Figure 93 . The switches in the ring topology (see Figure 94 ) are in the
same order as connected in the rack.