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"

DEPRECATION NOTICE

       The     txp     driver     is     not     present     in     FreeBSD     13.0     and     later.      See
       https://github.com/freebsd/fcp/blob/master/fcp-0101.md for more information.

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.

       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                                          October 24, 2018                                          TXP(4)