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NAME
     rue — RealTek RTL8150 USB to Fast Ethernet controller driver


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

           device uhci
           device ohci
           device usb
           device miibus
           device uether
           device rue

     Alternatively, to load the driver as a module at boot time, place the following line in
     loader.conf(5):

           if_rue_load="YES"


DESCRIPTION
     The rue driver provides support for USB Ethernet adapters based on the RealTek RTL8150 USB
     to Fast Ethernet controller chip.

     The RTL8150 contains an integrated Fast Ethernet MAC, which supports both 10 and 100Mbps
     speeds in either full or half duplex.  Although designed to interface with 100Mbps
     peripheral, the existing USB standard specifies a maximum transfer speed of 12Mbps.  Users
     should therefore not expect to actually achieve 100Mbps speeds with this device.

     The rue driver supports the following media types:

     autoselect   Enable auto selection of the media type and options.  The user can manually
                  override the auto selected mode by adding media options to the /etc/rc.conf
                  file.

     10baseT/UTP  Set 10Mbps operation.  The mediaopt option can also be used to select either
                  full-duplex or half-duplex modes.

     100baseTX    Set 100Mbps (Fast Ethernet) operation.  The mediaopt option can also be used to
                  select either full-duplex or half-duplex modes.

     The rue driver supports the following media options:

     full-duplex  Force full duplex operation.

     half-duplex  Force half duplex operation.

     For more information on configuring this device, see ifconfig(8).


HARDWARE
     The rue driver supports RealTek RTL8150 based USB Ethernet adapters including:

     •   Buffalo (Melco Inc.) LUA-KTX
     •   Green House GH-USB100B
     •   LinkSys USB100M
     •   Billionton 10/100 FastEthernet USBKR2


DIAGNOSTICS
     rue%d: watchdog timeout  A packet was queued for transmission and a transmit command was
     issued, however the device failed to acknowledge the transmission before a timeout expired.

     rue%d: rx list init failed  The driver failed to allocate an mbuf for the transmitter ring.

     rue%d: no memory for rx list  The driver failed to allocate an mbuf for the receiver ring.


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

     RealTek RTL8150 data sheet, http://pdf.seekdatasheet.com/2008714/200807142333305235.pdf.


HISTORY
     The rue device driver first appeared in FreeBSD 5.1.


AUTHORS
     The rue driver was written by Shunsuke Akiyama <akiyama@FreeBSD.org>.