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648 Port InfiniBand QDR Switch Platform User Manual
5
InfiniBand QSFP Cable Installation
The switch uses industry standard QSFP InfiniBand cables which are available from sev-
eral vendors. The standard QSFP cables support full 40+40Gb/s (QDR), 20+20Gb/s
(DDR) and 10+10Gb/s (SDR) bidirectional wire speed of the switch ports. All InfiniBand
QSFP connections are made to the leaf boards. Each leaf has 18 InfiniBand QSFP connec-
tors in two rows, which are numbered 1-18.
All cables can be inserted or removed with the unit powered on. To insert a cable, press the
connector onto the port receptacle until the connector is firmly seated. The green LED
indicator above the port will light when the physical connection is established (when both
ends of the cable are properly connected to working devices). To remove, disengage the
lock and slowly pull the connector away from the port receptacle. For a valid physical
connection both ends of the cable must be connected to working devices.
Mellanox Technologies
If maximum cable lengths are exceeded data transfer will be reduced and the bit error
rate will increase.
FDR BandWidth is supported only by MLNX QSFP cables.
Warning: Take care to not impede the air flow through the ventilation holes next to the
InfiniBand ports. Use cable lengths which allow routing horizontally around to the side
of the chassis before bending upward or downward in the rack.
Cables in the bottom row of the leafs should be inserted up side down in relation to the
how the cables are inserted in the top row of the leafs.
Figure 33: Top and Bottom Ports
Rev 2.1
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