Resolve issue with Unsupported SFP+ module

You may experience an issue with SFP+ modules on Intel 10G adapter, where the card fails to initiate the SFP+ module, displaying the following error message in dmesg:

ixgbe 0000:02:00.1: failed to load because an unsupported SFP+ module type was detected.


Unload the driver:

rmmod ixgbe

Load driver with option allow_unsupported_sfp=1:

modprobe ixgbe allow_unsupported_sfp=1

If the network interface has been started successfully, you can configure the network and verify that it works correctly.

Several network interfcaces

If there are several network interfaces, it may be necessary to write 1 for each of them, this is done by the number and separated by commas. For four interfaces, the option will look like this:

modprobe ixgbe allow_unsupported_sfp=1,1,1,1

Save option

The above solution only for test and will be flushed after server reboot. For permanent configuration pass option to the kernel via the grub boot loader.

Open file /etc/default/grub in any text editor and find the line started with:


add the parameter ixgbe.allow_unsupported_sfp=1:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash ixgbe.allow_unsupported_sfp=1"

Save the file and apply the changes:

sudo update-grub

Restart your server