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     mlx5en — Mellanox ConnectX-4, ConnectX-4 LX and ConnectX-5 based 100Gb, 50Gb, 40Gb, 25Gb and
     10Gb Ethernet adapter driver


     To compile this driver into the kernel, place the following lines in your kernel
     configuration file:

           options COMPAT_LINUXKPI
           options RATELIMIT
           device xz
           device mlxfw
           device firmware
           device mlx5
           device mlx5en

     To load the driver as a module at run-time, run the following command as root:

           kldload mlx5en

     To load the driver as a module at boot time, place the following lines in loader.conf(5):



     The mlx5en driver provides support for PCI Express Ethernet adapters based on ConnectX-4,
     ConnectX-4 LX and ConnectX-5.  The driver supports Jumbo Frames, Transmit/Receive checksum
     offload, TCP segmentation offload (TSO), Large Receive Offload (LRO), HW Large Receive
     Offload (HW LRO), VLAN tag insertion/extraction, VLAN checksum offload, VLAN TSO, hardware
     rate limiting (TXRTLMT) and Receive Side Steering (RSS).
     The network interface is named mce.
     For further hardware information and questions related to hardware requirements, see

     For more information on configuring this device, see ifconfig(8).


     The mlx5en driver supports 100Gb, 50Gb, 40Gb, 25Gb and 10Gb Ethernet adapters.  ConnectX-5
     supports:10/20/25/40/50/56/100Gb/s speeds.  ConnectX-4 supports:10/20/25/40/50/56/100Gb/s
     speeds.  ConnectX-4 LX supports:10/25/40/50Gb/s speeds (and reduced power consumption) :

        Mellanox MCX455A-ECAT
        Mellanox MCX456A-ECAT
        Mellanox MCX415A-CCAT
        Mellanox MCX416A-CCAT
        Mellanox MCX455A-FCAT
        Mellanox MCX456A-FCAT
        Mellanox MCX415A-BCAT
        Mellanox MCX416A-BCAT
        Mellanox MCX4131A-GCAT
        Mellanox MCX4131A-BCAT
        Mellanox MCX4121A-ACAT
        Mellanox MCX4111A-ACAT
        Mellanox MCX4121A-XCAT
        Mellanox MCX4111A-XCAT


     For general information and support, go to the Mellanox support website at:

     If an issue is identified with this driver with a supported adapter, email all the specific
     information related to the issue to ⟨⟩.




     The mlx5en device driver first appeared in FreeBSD 11.0.


     The mlx5en driver was written by Mellanox Technologies <>.