Copyright (c) 2001 Miodrag Vallat.
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.Dd October 5, 2001 .Dt GEM 4 .Os .Sh NAME .Nm gem .Nd GEM gigabit ethernet interface .Sh SYNOPSIS .Cd "gem* at pci? dev ? function ?" .Cd "bmtphy* at mii? phy ?" .Cd "brgphy* at mii? phy ?" .Cd "lxtphy* at mii? phy ?" .Cd "nsphy* at mii? phy ?"
.Cd "qsphy* at mii? phy ?"
.Sh DESCRIPTION The .Nm interface provides access to the 10Mb/s, 100Mb/s and 1Gb/s Ethernet networks. The .Nm is found on the .Tn Sun GEM and ERI 10/100 boards, as well as the .Tn Apple internal GMAC ethernet.
p Each of the host's network addresses is specified at boot time with an .Dv SIOCSIFADDR .Xr ioctl 2 . The .Nm interface employs the address resolution protocol described in .Xr arp 4 to dynamically map between Internet and Ethernet addresses on the local network.
p When a .Nm interface is brought up, by default, it will attempt to auto-negotiate the link speed and duplex. The speeds are tried in descending order; first in full duplex mode, then half duplex.
p
The
.Nm
supports several media types, which are selected via the
.Xr ifconfig 8
command.
The supported media types are:
l -tag -width "media autoselect" -offset indent t media autoselect Attempt to autoselect the media type (default)
Check and correct the gigabit modes. Are both copper and fiber supported?
And in both duplex modes as well?
t media 1000baseT mediaopt full-duplex Use 1000baseT on copper, full duplex
t media 1000baseT Op mediaopt half-duplex Use 1000baseT on copper, half duplex
t media 1000baseSX mediaopt full-duplex Use 1000baseSX on fiber, full duplex
t media 1000baseSX Op mediaopt half-duplex Use 1000baseSX on fiber, half duplex
t media 100baseTX mediaopt full-duplex Use 100baseTX, full duplex
t media 100baseTX Op mediaopt half-duplex Use 100baseTX, half duplex
t media 10baseT mediaopt full-duplex Use 10baseT, full duplex
t media 10baseT Op mediaopt half-duplex Use 10baseT, half duplex
.El
.Sh SEE ALSO
.Xr arp 4 ,
.Xr bmtphy 4 ,
.xr brgphy 4 ,
.Xr ifmedia 4 ,
.Xr inet 4 ,
.Xr intro 4 ,
.Xr lxtphy 4 ,
.Xr netintro 4 ,
.Xr nsphy 4
.Xr qsphy 4
.Xr hostname.if 5 ,
.Xr ifconfig 8
.Sh HISTORY
.Ox
support for the
.Nm
first appeared in
.Ox 3.0 .