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 txpAlternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):
if_txp_load="YES"
DEPRECATION NOTICE
Thetxp driver is not present in
FreeBSD 13.0 and later. See
https://github.com/freebsd/fcp/blob/master/fcp-0101.md for more information.
DESCRIPTION
The txp 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 txp 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 txp 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 txp 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 txp driver first appeared in
OpenBSD 2.9.