| TXP(4) | Device Drivers Manual | TXP(4) | 
txp —
txp* at pci? dev ? function ?
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:
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:
txp driver first appeared in NetBSD
  2.0.
| August 21, 2003 | NetBSD 10.1 |