IOMMU - Enabling

You can do this by setting the following in /etc/default/grub:

GRUB_CMDLINE_LINUX_DEFAULT="intel_iommu=on"

Update Grub:

update-grub

After reboot check with:

dmesg | grep -e DMAR -e IOMMU
find /sys/kernel/iommu_groups/ -type l

Making changes to VF persistent:

sudo vi /etc/modprobe.d/ixgbe.conf
options ixgbe max_vfs=8
update-initramfs -u

Checking after reboot/reload:

lspci | grep -i ethernet