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GEM(4) Device Drivers Manual GEM(4)

gem
GEM 10/100/Gigabit Ethernet device

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

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

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)

OpenBSD support for gem first appeared in OpenBSD 3.0.
October 14, 2008 OpenBSD-5.6