Mellanox

cd /root
cp /usr/downloads/MLNX_OFED_LINUX-2.4-1.0.4-rhel6.6-x86_64.iso .
mkdir tmp
mount -o loop MLNX_OFED_LINUX-2.4-1.0.4-rhel6.6-x86_64.iso tmp
cd tmp
./mlnxofedinstall

Atfer it installed, run /usr/bin/system-config-network and setup p6p1 device as manual network with appropriate settings. Shutdown computer, unplug copper cable and start computer, 10G fiber link should become default one.