10Gbps+ Ethernet Essentials

Prerequisites

MLNX_OFED_LINUX-5.1 no longer supports lowest-end Mellanox ConnectX3 series; using MLNX_OFED_LINUX-5.0 instead.

sudo mount [MLNX…_ubuntu20.04_x86_64.iso] /mnt/cdrom -o loop
./mlnxofedinstall

Start configuration

sudo mst start
sudo mst status

Details

ibv_devinfo

mlxconfig -d [device_identifier] query
mlxconfig -d [device_identifier] set LINK_TYPE_P1=2

sudo systemctl start opensmd

See also more.