Bug ID 1116845: Interfaces using the xnet driver are not assigned a MAC address ... Symptoms ... Interfaces on BIG-IP Virtual Edition that are capable of 100gb are unusable when the default driver of xnet is used. ... The following validation error will be present in /var/log/ltm "01071ab7:3: 'not-supported' is an invalid forward-error-correction setting for Interface" The interfaces will not report a MAC address in either of: - tmsh list /net interfaces - tmsh show /sys mac ... Interfaces are not assigned a MAC address, therefore are unusable. ... Conditions ... BIG-IP Virtual Edition where the interfaces report a 100gb max speed and the xnet driver is used. ... Workaround ... Force the interface(s) to use a driver other then xnet. ... In order to apply the workaround you will need to get 1) the available drivers and 2) the pci id of the interfaces. ... The available drivers are reported using this tmctl command: # tmctl -d blade tmm/device_probed pci_bdf pseudo_name type available...