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Man Pages
MGB(4) FreeBSD Kernel Interfaces Manual MGB(4)

mgb —
Microchip LAN743x PCIe Gigabit Ethernet driver

To load the driver as a module at boot time, place the following line in loader.conf(5): 
if_mgb_load="YES"

The mgb driver is experimental, and has a number of caveats and limitations. It is currently available only as a kernel module.

The mgb device driver provides support for PCIe Gigabit Ethernet adapters based on Microchip's LAN7430 and LAN7431.

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

The mgb driver supports:

  • Microchip LAN7430 PCIe Gigabit Ethernet controller with PHY
  • Microchip LAN7431 PCIe Gigabit Ethernet controller with RGMII interface

arp(4), miibus(4), ifconfig(8)

The driver does not yet implement support for many hardware features, including:
  • Multiple RX queue support
  • RX and TX checksum offload
  • Hardware VLAN tagging or untagging
  • Multicast receive packet filtering
  • Wake on LAN (WoL)
  • LSO
  • RSS

LAN7431 support is completely untested.

September 28, 2021 FreeBSD 13.1-RELEASE
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