txp (4)

Leading comments

    $OpenBSD: txp.4,v 1.8 2001/06/26 02:09:11 pjanzen Exp $

Copyright (c) 2001 Jason L. Wright (jason@thought.net)
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this ...

(The comments found at the beginning of the groff file "man4/txp.4freebsd".)

NAME

txp - 3Com 3XP Typhoon/Sidewinder (3CR990) Ethernet interface

SYNOPSIS

To compile this driver into the kernel, place the following line in your kernel configuration file:

device txp

Alternatively, to load the driver as a module at boot time, place the following line in loader.conf5:

if_txp_load="YES"

DESCRIPTION

The interface provides access to the 10Mb/s and 100Mb/s Ethernet networks via the 3Com Typhoon/Sidewinder chipset.

Basic Ethernet functions are provided as well as support for vlan(4) tag removal and insertion assistance, receive ip(4), tcp(4), and udp(4) checksum offloading, and transmit ip(4) checksum offloading. There is currently no support for transmit tcp(4) or udp(4) checksum offloading, tcp(4) segmentation, nor ipsec(4) acceleration.

When a interface is brought up, by default, it will attempt to auto-negotiate the link speed and duplex mode. The speeds, in order of attempt, are: 100Mb/s Full Duplex, 100Mb/s Half Duplex, 10 Mb/s Full Duplex, and 10 Mb/s Half Duplex.

The 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 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

HARDWARE

The driver supports the following cards:

• 3Com 3CR990-TX-95
• 3Com 3CR990-TX-97
• 3Com 3cR990B-TXM
• 3Com 3CR990SVR95
• 3Com 3CR990SVR97
• 3Com 3cR990B-SRV

SEE ALSO

altq(4), arp(4), inet(4), intro(4), ip(4), miibus(4), tcp(4), udp(4), vlan(4), ifconfig(8)

HISTORY

The driver first appeared in Ox 2.9 .