GEM(4)

NAME
gem - GEM 10/100/Gigabit Ethernet device

SYNOPSIS
gem* at pci?
gem* at sbus?
bmtphy* at mii?
brgphy* at mii?
eephy* at mii?
gentbi* at mii?
luphy* at mii?
lxtphy* at mii?

DESCRIPTION
The gem driver provides support for various NICs based on the GEM Ethernet controller chips, including the following:

•   Apple GMAC (10/100/1000baseT)
•   Sun ERI (10/100baseT)
•   Sun GEM (10/100/1000baseT)
•   Sun GEM (1000baseSX)

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

The gem 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 1000baseSX mediaopt full-duplex
    Use 1000baseSX on fiber, full duplex

media 1000baseSX [mediaopt half-duplex]
    Use 1000baseSX on fiber, half duplex

media 100baseTX mediaopt full-duplex
    Use 100baseTX, full duplex

media 100baseTX [mediaopt half-duplex]
    Use 100baseTX, half duplex

media 10baseT mediaopt full-duplex
    Use 10baseT, full duplex

media 10baseT [mediaopt half-duplex]
    Use 10baseT, half duplex

SEE ALSO
arp(4), bmtphy(4), brgphy(4), eephy(4), gentbi(4), ifmedia(4), inet(4), intro(4), luphy(4), lxtphy(4), netintro(4), hostname.if(5), ifconfig(8)

HISTORY
OpenBSD support for gem first appeared in OpenBSD 3.0.