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VMX(4) Device Drivers Manual VMX(4)

vmxVMware 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 system.

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 controller 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 hardware VLAN tagging in VMware's VLAN Guest Tagging (VGT) mode.

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

The vmx driver supports the following media types:

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 machine.
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 first appeared in OpenBSD 5.5.

The vmx driver was written by Tsubai Masanari.

October 17, 2017 OpenBSD-6.4