Planning The Cabling Scheme - H3C S5800 Series Installation Manual

Planning the cabling scheme

Use SFP+ cables, twisted pair cables, or SFP+ transceivers and fibers to connect the IRF member switches.
If the IRF member switches are far away from one another, choose the SFP+ transceiver modules with
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
10 GE SFP+ transceiver
SFP-XG-SX-MM850-A
SFP-XG-LX220-MM1310
SFP-XG-LX-SM1310
10 GE SFP+ cable
LSWM1STK
LSWM2STK
LSWM3STK
LSTM1STK
LSTM2STK
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
same order as connected in the rack.
Central
Connector
wavelength
850 nm LC
1310 nm LC
1310 nm LC
N/A N/A
N/A N/A
N/A N/A
N/A N/A
N/A N/A
Figure 93. The switches in the ring topology (see
82
Fiber
50/125 μm multimode
optical fiber
62.5/125 μm multimode
optical fiber
9/125 μm single mode
optical fiber
SFP+ cable
SFP+ cable
SFP+ cable
SFP+ cable
SFP+ cable
Max transmission
distance
300 m (984.3 ft.)
220 m (721.8 ft.)
10 km (about 6.21
mi)
0.65 m (2.1 ft)
1.2 m (3.9 ft)
3 m (9.8 ft)
5 m (16.4 ft)
7 m (22.97 ft)
Figure 94) are in the