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NEP(4) Device Drivers Manual NEP(4)

nepSun Neptune 10Gb Ethernet device

nep* at pci?
brgphy* at mii?

The nep driver provides support for various NICs based on the Sun Neptune Ethernet controller chips, including the following:

It uses an internal or external PHY or an external 10-bit interface.

The nep driver supports several media types, which are selected via the ifconfig(8) command. The supported media types are:

media autoselect
Attempt to autoselect the media type (default)
media 1000baseT mediaopt full-duplex
Use 1000baseT on copper, full duplex
media 1000baseT [mediaopt half-duplex]
Use 1000baseT on copper, half duplex
media 100baseTX mediaopt full-duplex
Use 100baseTX, full duplex
media 100baseTX [mediaopt half-duplex]
Use 100baseTX, half duplex

arp(4), brgphy(4), ifmedia(4), inet(4), intro(4), netintro(4), hostname.if(5), ifconfig(8)

OpenBSD support for nep first appeared in OpenBSD 5.7.

The nep driver was written by Mark Kettenis <>.

The nep driver currently only supports 1Gb Ethernet NICs. It also does not yet use many of the advanced features the Neptune chip offers.

January 10, 2015 OpenBSD-6.9