157 lines
3.8 KiB
Groff
157 lines
3.8 KiB
Groff
.\" $OpenBSD: txp.4,v 1.8 2001/06/26 02:09:11 pjanzen Exp $
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.\"
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.\" Copyright (c) 2001 Jason L. Wright (jason@thought.net)
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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.\" DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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.\" INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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.\" ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd July 16, 2005
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.Dt TXP 4
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.Os
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.Sh NAME
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.Nm txp
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.Nd "3Com 3XP Typhoon/Sidewinder (3CR990) Ethernet interface"
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.Sh SYNOPSIS
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To compile support for the
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.Nm
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driver into your kernel, place the following line in your
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kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "device txp"
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.Ed
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.Pp
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Alternatively, to load the
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.Nm
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driver at boot time, place the following line in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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if_txp_load="YES"
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.Ed
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.Sh DESCRIPTION
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The
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.Nm
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interface provides access to the 10Mb/s and 100Mb/s Ethernet networks via the
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.Tn 3Com
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.Tn Typhoon/Sidewinder
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chipset.
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.Pp
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Basic Ethernet functions are provided as well as support for
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.Xr vlan 4
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tag removal and insertion assistance, receive
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.Xr ip 4 ,
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.Xr tcp 4 ,
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and
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.Xr udp 4
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checksum offloading,
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and
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transmit
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.Xr ip 4
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checksum offloading.
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There is currently no support for
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transmit
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.Xr tcp 4
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or
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.Xr udp 4
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checksum offloading,
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.Xr tcp 4
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segmentation, nor
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.Xr ipsec 4
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acceleration.
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Note that hardware checksumming is only used when the interface is not
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in
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.Xr bridge 4
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mode.
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.Pp
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Each of the host's network addresses
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is specified at boot time with an
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.Dv SIOCSIFADDR
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.Xr ioctl 2 .
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The
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.Nm
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interface employs the address resolution protocol described in
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.Xr arp 4
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to dynamically map between Internet and Ethernet addresses on the local
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network.
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.Pp
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When a
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.Nm
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interface is brought up, by default, it will attempt to auto-negotiate the
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link speed and duplex mode.
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The speeds, in order of attempt, are:
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100Mb/s Full Duplex, 100Mb/s Half Duplex, 10 Mb/s Full Duplex, and
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10 Mb/s Half Duplex.
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.Pp
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The
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.Nm
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supports several media types, which are selected via the
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.Xr ifconfig 8
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command.
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The supported media types are:
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.Bl -tag -width indent
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.It Cm media autoselect
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Attempt to autoselect the media type (default)
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.It Cm media 100baseTX mediaopt full-duplex
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Use 100baseTX, full duplex
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.It Cm media 100baseTX Op Cm mediaopt half-duplex
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Use 100baseTX, half duplex
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.It Cm media 10baseT mediaopt full-duplex
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Use 10baseT, full duplex
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.It Cm media 10baseT Op Cm mediaopt half-duplex
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Use 10baseT, half duplex
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.El
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.Sh HARDWARE
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The
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.Nm
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driver supports the following cards:
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.Pp
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.Bl -bullet -offset indent -compact
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.It
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3Com 3CR990-TX-95
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.It
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3Com 3CR990-TX-97
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.It
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3Com 3cR990B-TXM
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.It
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3Com 3CR990SVR95
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.It
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3Com 3CR990SVR97
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.It
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3Com 3cR990B-SRV
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.El
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.Sh SEE ALSO
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.Xr arp 4 ,
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.Xr inet 4 ,
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.Xr intro 4 ,
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.Xr ip 4 ,
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.Xr miibus 4 ,
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.Xr tcp 4 ,
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.Xr udp 4 ,
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.Xr vlan 4 ,
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.Xr ifconfig 8
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.Sh HISTORY
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The
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.Nm
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driver first appeared in
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.Ox 2.9 .
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