H3C Technologies H3C S5560 Series Switches - Manual (Page 54)

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SFP+/QSFP+ DAC cables. For more information about SFP+/QSFP+ DAC cables and SFP+/QSFP+
transceiver modules, see " Appendix C Ports and LEDs ."
The following subsections describe several H3C recommended IRF connection schemes, and 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 SFP+ DAC cables to connect the IRF member switches (9 switches in this example) in a rack as shown
in Figure 55 . The switches in the ring topology (see Figure 56 ) are in the same order as connected in the
rack.