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     udbp — USB Double Bulk Pipe driver


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

           device udbp

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



     The udbp driver provides support for host-to-host cables that contain at least two bulk
     pipes (one for each direction), for example the EzLink cable and the NetChip 1080 chip.

     It requires netgraph(4) to be available.  This can be done either by adding options NETGRAPH
     to your kernel configuration file, or alternatively loading netgraph(4) as a module, either
     from /boot/loader.conf or from the command line, before the udbp module.


           options NETGRAPH
           device udbp

     Add the udbp driver to the kernel.

           kldload netgraph
           kldload udbp

     Load the netgraph(4) module and then the udbp driver.

           ngctl mkpeer udbp0: iface data inet
           ifconfig ng0

     Create a new network interface node and connect its inet hook to the data hook of the udbp
     node.  ifconfig(8) configures the resulting network interface ng0 with a local IP address of and a remote IP address of  On the remote host, the two IP addresses
     should of course be reversed.


     netgraph(4), ng_iface(4), ohci(4), uhci(4), usb(4), ngctl(8)


     The udbp driver first appeared in FreeBSD 5.0.


     The udbp driver was written by Doug Ambrisko <>, Julian Elischer
     <> and Nick Hibma <>.

     This manual page was written by Nick Hibma <>.