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VMX(4)                   BSD Kernel Interfaces Manual                   VMX(4)

     vmx -- VMware VMXNET3 Virtual Interface Controller device

     vmx* at pci?

     The vmx driver provides support for the VMXNET3 virtual NIC available in
     virtual machines by VMware.  It appears as a simple Ethernet device but
     is actually a virtual network interface to the underlying host operating

     This driver supports the VMXNET3 driver protocol, as an alternative to
     the emulated pcn(4), em(4) and the earlier VMXNET vic(4) interfaces also
     available in the VMware environment.  The vmx driver is optimized for the
     virtual machine, it can provide advanced capabilities depending on the
     underlying host operating system and the physical network interface con-
     troller of the host.  In comparison to the earlier VMXNET versions, as
     supported by the vic(4) driver, VMXNET3 supports additional features like
     multiqueue support, IPv6 checksum offloading, MSI/MSI-X support and hard-
     ware VLAN tagging in VMware's VLAN Guest Tagging (VGT) mode.

     The vmx driver supports VMXNET3 VMware virtual NICs provided by the vir-
     tual machine hardware version 7 or newer, as provided by the following

           o   VMware ESX/ESXi 4.0 and newer
           o   VMware Server 2.0 and newer
           o   VMware Workstation 6.5 and newer
           o   VMware Fusion 2.0 and newer

     The vmx driver supports the following media types:

     autoselect  Enable autoselection of the media type and options.  The
                 driver always uses the fastest available speed and the media
                 options provided by the underlying host of the virtual

     10GbaseT mediaopt full-duplex
                 Set 10Gbps operation.

     1000baseT mediaopt full-duplex
                 Set 1000Mbps operation.

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

     The following entry must be added to the VMware configuration file to
     provide the vmx device:

           ethernet0.virtualDev = "vmxnet3"

     arp(4), em(4), ifmedia(4), intro(4), netintro(4), pci(4), pcn(4), vic(4),
     hostname.if(5), ifconfig(8)

     The vmx driver was written by Tsubai Masanari.

BSD                              May 31, 2013                              BSD