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NFE(4) Device Drivers Manual NFE(4)

nfe
NVIDIA nForce MCP 10/100/Gigabit Ethernet device

nfe* at pci?
atphy* at mii?
brgphy* at mii?
ciphy* at mii?
eephy* at mii?
icsphy* at mii?
rgephy* at mii?
rlphy* at mii?

The nfe driver supports Fast Ethernet and Gigabit Ethernet adapters based on the NVIDIA nForce Media and Communications Processors (MCP), the nForce, nForce 2, nForce 3, CK804, MCP04, MCP51, MCP55, MCP61, MCP65, MCP67, MCP73, MCP77, MCP79 and MCP89 Ethernet controller chips.
The nfe driver supports IPv4 transmit/receive IP/TCP/UDP checksum offload with the nForce 3, CK804, MCP55, MCP77, MCP79 and MCP89 chipsets and VLAN tag insertion and stripping with the MCP55 chipset.
The nfe driver additionally supports Wake on LAN (WoL). See arp(8) and ifconfig(8) for more details.
The nfe driver supports the following media types:
Enable autoselection of the media type and options.
Set 10Mbps operation.
Set 100Mbps (Fast Ethernet) operation.
Set 1000Mbps (Gigabit Ethernet) operation (recent models only).

arp(4), atphy(4), brgphy(4), ciphy(4), eephy(4), icsphy(4), ifmedia(4), intro(4), netintro(4), pci(4), rgephy(4), rlphy(4), hostname.if(5), ifconfig(8)

The nfe device driver first appeared in OpenBSD 3.9.

The nfe driver was written by Jonathan Gray <jsg@openbsd.org> and Damien Bergamini <damien.bergamini@free.fr>.

NVIDIA refuse to release any documentation on their products.
August 20, 2013 OpenBSD-current