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.conf(5):
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.
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 Internet and
Ethernet addresses on the local network.
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.