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     tx — SMC 83c17x Fast Ethernet device driver


     To compile this driver into the kernel, place the following lines in your kernel
     configuration file:

           device miibus
           device tx

     Alternatively, to load the driver as a module at boot time, place the following line in



     The tx driver is not present in FreeBSD 13.0 and later.  See for more information.


     The tx driver provides support for the Ethernet adapters based on the SMC 83c17x (EPIC)
     chips.  These are mostly SMC 9432 series cards.

     The tx driver supports the following media types (depending on card's capabilities):

     autoselect   Enable autonegotiation (default).

     100baseFX    Set 100Mbps (Fast Ethernet) fiber optic operation.

     100baseTX    Set 100Mbps (Fast Ethernet) twisted pair operation.

     10baseT/UTP  Set 10Mbps on 10baseT port.

     10base2/BNC  Set 10Mbps on 10base2 port.

     The tx driver supports the following media options:

     full-duplex  Set full-duplex operation.

     The tx driver supports oversized Ethernet packets (up to 1600 bytes).  Refer to the
     ifconfig(8) man page on setting the interface's MTU.

     The old “ifconfig tx0 linkN” method of configuration is not supported.

   VLAN (IEEE 802.1Q) support
     The tx driver supports the VLAN operation (using vlan(4) interfaces) without decreasing the
     MTU on the vlan(4) interfaces.


     tx%d: device timeout %d packets  The device stops responding.  Device and driver reset
     follows this error.

     tx%d: PCI fatal error occurred (%s)  One of following errors occurred: PCI Target Abort, PCI
     Master Abort, Data Parity Error or Address Parity Error.  Device and driver reset follows
     this error.

     tx%d: cannot allocate mbuf header/cluster  Cannot allocate memory for received packet.
     Packet thrown away.

     tx%d: can't stop %s DMA  While resetting, the driver failed to stop the device correctly.


     arp(4), miibus(4), netintro(4), ng_ether(4), ifconfig(8)


     The auto-negotiation does not work very well.