.\"	$OpenBSD: le.4,v 1.18 2004/03/22 22:07:21 miod Exp $
.\" Copyright (c) 1992, 1993
.\"	The Regents of the University of California.  All rights reserved.
.\"
.\" This software was developed by the Computer Systems Engineering group
.\" at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
.\" contributed to Berkeley.
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.\" 3. Neither the name of the University nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
.\"    without specific prior written permission.
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.\"	from: Header: le.4,v 1.2 92/10/13 05:31:33 leres Exp
.\"	from: @(#)le.4	8.1 (Berkeley) 6/9/93
.\"
.Dd June 9, 1993
.Dt LE 4 sparc
.Os
.Sh NAME
.Nm le
.Nd SPARC AMD 7990 LANCE ethernet interface
.Sh SYNOPSIS
.Cd "le0 at sbus0 slot ? offset ?            " Pq "sun4c onboard"
.Cd "le* at sbus? slot ? offset ?            " Pq Sbus
.Cd "lebuffer* at sbus? slot ? offset ?      " Pq Sbus
.Cd "le* at lebuffer?                        " Pq Sbus
.Cd "ledma0 at sbus0 slot ? offset ?         " Pq "sun4m onboard"
.Cd "le0 at ledma0                           " Pq "sun4m onboard"
.Cd "le0 at obio0 addr 0xf9000000 level 6    " Pq sun4/300
.Sh DESCRIPTION
The
.Nm
interface provides access to the 10 Mb/s
.Tn Ethernet
network via the
.Tn AMD
Am7990
Local Area Network Controller for Ethernet
.Pq Tn LANCE
chip set.
.Pp
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
.Tn Ethernet
addresses on the local network.
.Pp
Different cards and machines have different kinds of connectors,
as follows:
.Bl -tag -width "media autoselect"
.It AUI/DIX
Standard 15 pin connector
.It 10BaseT
UTP, also known as twisted pair
.El
.Pp
By default, the system will select the media type automatically, but the
.Xr ifconfig 8
command can be used to force the media selection.
The media types are shown below:
.Bl -tag -width "media autoselect"
.It media autoselect
Attempt to autoselect the media type (default)
.It media 10base5
Use the AUI connector
.It media 10baseT
Use the twisted pair connector
.El
.Sh NOTES
Some sbus models, in particular the 501-1450 and 501-1881, have dip
switches which must be changed to select between the BNC and AUI modes.
For BNC, set 1-6 ON, 7-8 OFF; for AUI set 1-6 OFF, and 7-8 ON.
.Sh SEE ALSO
.Xr arp 4 ,
.Xr be 4 ,
.Xr hme 4 ,
.Xr ie 4 ,
.Xr ifmedia 4 ,
.Xr inet 4 ,
.Xr intro 4 ,
.Xr netintro 4 ,
.Xr qe 4 ,
.Xr sbus 4 ,
.Xr hostname.if 5 ,
.Xr ifconfig 8