txp(4)
NAME
- txp - 3Com 3XP Typhoon/Sidewinder (3CR990) Ethernet inter
- face
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.conf(5):
if_txp_load="YES"
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. Note that
- hardware
checksumming is only used when the interface is not in
- bridge(4) mode.
- Each of the host's network addresses is specified at boot
- time with an
SIOCSIFADDR ioctl(2). The txp interface employs the address
- resolution
protocol described in arp(4) to dynamically map between In
- ternet and Ethernet addresses on the local network.
- When a txp interface is brought up, by default, it will at
- tempt to autonegotiate 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:
- +o 3Com 3CR990-TX-95
+o 3Com 3CR990-TX-97
+o 3Com 3cR990B-TXM
+o 3Com 3CR990SVR95
+o 3Com 3CR990SVR97
+o 3Com 3cR990B-SRV
SEE ALSO
- 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.
- BSD July 16, 2005