Bug ID 1116845: Interfaces using the xnet driver are not assigned a MAC address

Last Modified: Nov 25, 2022

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
15.1.6

Opened: Jun 17, 2022
Severity: 1-Blocking

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

Impact

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_drivers driver_in_use ------------ ----------- --------- -------------------- ------------- 0000:00:03.0 F5DEV_PCI mlxvf5, xnet, sock, 0000:00:05.0 1.1 F5DEV_PCI mlxvf5, xnet, sock, xnet 0000:00:06.0 1.2 F5DEV_PCI mlxvf5, xnet, sock, xnet The pci id is reported with the lspci -nnvvv command: In this example: the pci id is 15b3:101a # lspci -nnvvv | grep -i ethernet 00:03.0 Ethernet controller [0200]: Mellanox Technologies MT28800 Family [ConnectX-5 Ex Virtual Function] [15b3:101a] 00:05.0 Ethernet controller [0200]: Mellanox Technologies MT28800 Family [ConnectX-5 Ex Virtual Function] [15b3:101a] 00:06.0 Ethernet controller [0200]: Mellanox Technologies MT28800 Family [ConnectX-5 Ex Virtual Function] [15b3:101a] And to force the use of a different driver you need to modify /config/tmm_init.tcl by adding a line such as: device driver vendor_dev 15b3:101a mlxvf5 Where the last values of that line are the pci id and driver name.

Fix Information

None

Behavior Change