NVIDIA Docs Hub Homepage NVIDIA Firmware Tools (MFT) Documentation v4.25.1 MTUSB Cable Board

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