H3C S5170-EI Series Installation Manual page 48

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SFP+ port—SFP+ fiber transceiver module and optical fiber or SFP+ cable. For the available
transceiver models and cables, see ports in H3C S5170-EI & S5570S-EI Switch Series
Hardware Information and Specifications.
For a short-distance IRF connection in an equipment room, use a twisted pair/SFP+/SFP cable.
For a long-distance IRF connection, use transceiver modules and optical fibers.
The following subsections describe several H3C recommended IRF connection schemes by using
SFP+ cables and SFP+ transceiver modules and fibers. 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
Connect the IRF member switches (4 switches in this example) in a rack as shown in
switches in the ring topology (see
Figure 38 Connecting the switches in one rack
1
2
3
4
1
2
3
4
Figure 39 IRF fabric topology
1
4
Figure 39) are in the same order as connected in the rack.
2
3
5
Figure 38. The