NAME
txp —
3Com 3XP Typhoon/Sidewinder
(3CR990) Ethernet interface
SYNOPSIS
txp* at pci? dev ? function ?
DESCRIPTION
The
txp interface provides access to the 10Mb/s and 100Mb/s
Ethernet networks via the 3Com Typhoon/Sidewinder chipset. This driver
supports the following cards:
- 3Com 3CR990-TX-95
- 3Com 3CR990-TX-97
- 3Com 3CR990SVR95
- 3Com 3CR990SVR97
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 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
SEE ALSO
arp(4),
ifmedia(4),
inet(4),
intro(4),
ip(4),
netintro(4),
pci(4),
tcp(4),
udp(4),
vlan(4),
ifconfig(8)
HISTORY
The
txp driver first appeared in
NetBSD
2.0.