Download latest #Mellanox Firmware tools and install them  + dependencies:

```
wget https://www.mellanox.com/downloads/MFT/mft-4.21.0-99-x86_64-deb.tgz
tar -xvf mft-4.21.0-99-x86_64-deb.tgz
cd mft-4.21.0-99-x86_64-deb/
apt-get install gcc make dkms unzip
apt install linux-headers-$(uname -r)
./install.sh
```

----

```
wget http://www.mellanox.com/downloads/MFT/mft-4.10.0-104-x86_64-deb.tgz
tar -xvf mft-4.10.0-104-x86_64-deb.tgz
cd mft-4.10.0-104-x86_64-deb/
apt-get install gcc make dkms unzip
apt install linux-headers-$(uname -r)
./install.sh
```

----
Start MST service:

```
mst start
mst status
```

Copy the dev address with cr0 in it, like:

	/dev/mst/mt4099_pci_cr0

Use that address in the following commands

---

Download latest FCBT firmware and unzip:

```
wget http://www.mellanox.com/downloads/firmware/fw-ConnectX3-rel-2_42_5000-MCX354A-FCB_A2-A5-FlexBoot-3.4.752.bin.zip
unzip fw-ConnectX3-rel-2_42_5000-MCX354A-FCB_A2-A5-FlexBoot-3.4.752.bin.zip
```

Backup the cards current board definition file just in case

	flint -d /dev/mst/mt4099_pci_cr0 dc orig_firmware.ini

Flash the FCBT image to the card

	flint -d /dev/mst/mt4099_pci_cr0 -i fw-ConnectX3-rel-2_42_5000-MCX354A-FCB_A2-A5-FlexBoot-3.4.752.bin -allow_psid_change burn

Cold boot the server when done

----

Start mst service again

	mst start

Get detailed firmware info

	mlxfwmanager --query

Get the device ID again:

	mst status

Use it to see the cards current configuration:

	mlxconfig -d /dev/mst/mt4099_pci_cr0 query

Use it in config commands to configure the card for instance, to turn both ports from VPI/Auto to Ethernet only:

	mlxconfig -d /dev/mst/mt4099_pci_cr0 set LINK_TYPE_P1=2 LINK_TYPE_P2=2

Turn off bootrom crap

	mlxconfig -d /dev/mst/mt4099_pci_cr0 set BOOT_OPTION_ROM_EN_P1=false
	mlxconfig -d /dev/mst/mt4099_pci_cr0 set BOOT_OPTION_ROM_EN_P2=false
	mlxconfig -d /dev/mst/mt4099_pci_cr0 set LEGACY_BOOT_PROTOCOL_P1=0
	mlxconfig -d /dev/mst/mt4099_pci_cr0 set LEGACY_BOOT_PROTOCOL_P2=0


Optional: delete bootrom off the card, so it doesn't slow down boot by popping up crap this is safe to do and supported by mellanox

	flint -d /dev/mst/mt4099_pci_cr0 --allow_rom_change drom