NVIDIA Firmware Tools (MFT) Documentation v4.29.0
NVIDIA Firmware Tools (MFT) Documentation v4.29.0

MTUSB Cable Board

The mlxcables tool supports reading cable data directly via i2c when the cable is connected to a dedicated board. The board is connected to the host with an MTUSB adapter.

Examples on a Windows machine:

After adding the cables using 'mst cable add' the following mst status is presented:

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mst status MST devices: ------------ mtusb-1 Cable MST devices: ------------------- mtusb-1_cable

Query the cable:

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mlxcables -d mtusb-1_cable Querying Cables .... Cable #1: --------- Cable name : mtusb-1_cable FW version : 2.0.208 FW Dev ID : 0x20 FW GW version : Legacy -------- Cable EEPROM -------- Identifier : QSFP+ (0dh) Technology : 850 nm VCSEL (00h) Compliance : 40G Active Cable (XLPPI), 100G AOC (Active Optical Cable) or 25GAUI C2M AOC. Wavelength : 850 nm OUI : 0x0002c9 Vendor : Mellanox Serial number : MT1707FT01544 Part number : MFA1A00-E001 Revision : A1 Temperature : 31 C Length : 1 m

Read from a specific address:

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mlxcables -d mtusb-1_cable -r -p 0 -o 165 -l 3 Page[0].Byte[165] = 0x00 Page[0].Byte[166] = 0x02 Page[0].Byte[167] = 0xc9

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