FreeBSD 7.0 manual page repository

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txp - 3Com 3XP Typhoon/Sidewinder (3CR990) Ethernet interface



      txp - 3Com 3XP Typhoon/Sidewinder (3CR990) Ethernet interface


      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):


      The txp interface provides access to the 10Mb/s and 100Mb/s Ethernet net‐
      works 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 Eth‐
      ernet 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


      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
      arp(4), inet(4), intro(4), ip(4), miibus(4), tcp(4), udp(4), vlan(4),


      The txp driver first appeared in OpenBSD 2.9.


Based on BSD UNIX
FreeBSD is an advanced operating system for x86 compatible (including Pentium and Athlon), amd64 compatible (including Opteron, Athlon64, and EM64T), UltraSPARC, IA-64, PC-98 and ARM architectures. It is derived from BSD, the version of UNIX developed at the University of California, Berkeley. It is developed and maintained by a large team of individuals. Additional platforms are in various stages of development.