Mellanox provides a series of tools to properly configure a cluster based on your choice of interconnect (InfiniBand or Ethernet).
The configuration tools are provide a mechanism to receive complete cluster configurations and full topology reports with recommended OEM-specific product part numbers (SKU's).
Mellanox InfiniBand Configurator
This online tool can help you to configure clusters based on a FAT Tree Topology with two levels of switch systems.
Cable and Optical Transceiver Configurator
This online tool can help you select the right copper DAC cable, Active Optical Cable (AOC), or optical transceiver for your Ethernet or InfiniBand application.