CO6_intel_X520

yum install http://www.elrepo.org/elrepo-release-6-6.el6.elrepo.noarch.rpm

yum update

yum install kmod-ixgbe

echo 'options ixgbe allow_unsupported_sfp=1,1,1,1,1,1' > /etc/modprobe.d/ixgbe.conf

modprobe -vr ixgbe

modprobe ixgbe

Ubuntu 16.04

The "allow_unsupported_sfp=1,1" they suggest does not work in the kernel I use. Only allow_unsupported_sfp=1

/etc/default/grub:

GRUB_CMDLINE_LINUX=" ixgbe.allow_unsupported_sfp=1"

update-grub

cat /etc/modprobe.d/ixgbe.conf

options ixgbe allow_unsupported_sfp=1

dpkg-reconfigure initramfs-tools