3.3. Configuring SR-IOV VFs Network Adapters¶

There are a few configuration steps required to create SR-IOV VFs network adapters:

• Identify network cards on your system and verify SR-IOV support.

• Verify that IOMMU is supported and loaded by your kernel when booting.

• Define how many SR-IOV VFs network adapters are created.

• Enable persistent device creation after reboot.

1. Identify the available network cards.

   # lshw -c network -businfo
   

   

2. Use the Bus info (without the pci@ part) from the previous step output to check for SR-IOV support. For example, on the enp360f0 device:

   # lspci -vs 0000:24:00.0
   

   

3. Create SR-IOV VFs network adapter. You need to set the required adapters’ number (one, in our example):

   # echo 1 > /sys/class/net/enp36s0f0/device/sriov_numvfs
   

4. Verify that adapters were correctly created.

   # lshw -c network -businfo
   

   

5. To make these changes permanent, you can create the following udev rules file (use the name of your interface as the file name).

   # vim /etc/udev/rules.d/enp36s0f0.rules
   ACTION=="add", SUBSYSTEM=="net", ENV{ID_NET_DRIVER}=="ixgbe",ATTR{device/sriov_numvfs}="1"