Converting Mellanox CX-3 to Ethernet mode

 

When first connecting the card to a machine, it more than likely will not show up in the network area as it's more than likely in Infiniband mode, it will need to be changed to use ETH mode

 

This tutorial assumes you are using Proxmox VE 8 or greater

 

Connect to the Proxmox shell and create a temp folder for all the tools and firmware we will download

mkdir temp cd temp

 

Install the needed packages for the firmware tool

apt update && apt install gcc make dkms proxmox-headers-$(uname -r)

 

Download the 4.22.1-417-LTS - Linux - DEB - x64 firmware tools:

wget https://www.mellanox.com/downloads/MFT/mft-4.22.1-417-x86_64-deb.tgz

 

Extract the file

tar -xvzf ./mft-4.22.1-417-x86_64-deb.tgz

 

Change the directory to the newly extracted folder

cd mft-4.22.1-417-x86_64-deb

 

Change the shell script to be executable

chmod +x ./install.sh

 

Run the install script

./install.sh

 

Start the mst service

mst start

 

Now run the command to show the status of connected MST devices, this is to confirm the system sees the card

mst status

 

 

Run the following command to change the device to ETH mode (Verify the /dev/mst/ address is matches what was listed in the last command)

mlxconfig -d /dev/mst/mt4099_pciconf0 set LINK_TYPE_P1=2 LINK_TYPE_P2=2

 

Confirm the config change

 

Reboot the system

 

You should now have both ports listed in networking!