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):

             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.

       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.

Debian                                           March 12, 2009                                           TXP(4)