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de(4)									 de(4)

       de - DEUNA/DELUA Ethernet interface

       device de0 at uba0 csr 0174510 vector deintr

       The  interface  provides access to a 10 Mb/s Ethernet network through a
       DEUNA/DELUA controller.

       The host's Internet address is specified at boot time with  an  SIOCSI‐
       FADDR  ioctl.   The  interface  employs the address resolution protocol
       described in to dynamically map between Internet and Ethernet addresses
       on the local network.

       The interface normally tries to use a ``trailer'' encapsulation to min‐
       imize copying data on input and output.	This can be  disabled  for  an
       interface  by  setting  the  IFF_NOTRAILERS  flag  with an SIOCSIFFLAGS
       ioctl.  Trailers are only used for packets destined for Internet hosts.

       The SIOCSPHYSADDR ioctl can be used to change and SIOCRPHYSADDR can  be
       used to read the physical address of the board.

       SIOCADDMULTI  and  SIOCDELMULTI can be used to add  or delete multicast
       addresses.  The board recognizes, at most, 10 multicast addresses.  The
       argument to these ioctls is a pointer to an ifreq structure found in

       SIOCRDCTRS  and	SIOCRDZCTRS  ioctls  can be used to read or ``read and
       clear'' the board counters. The argument	 to  these  two	 ioctls	 is  a
       pointer to a counter structure ``ctrreq'' found in

       The  ioctls  SIOCENABLBACK and SIOCDISABLBACK can be used to enable and
       disable the interface loopback mode.

       The PUP protocol family is not supported.

       de%d: command failed, csr0=%b csr1=%b
       Here, command is one of reset, pcbb, rdphyad, wtring, or wtmode.	  This
       message	is printed if there is an error on device initialization.  The
       following command failures can occur during ioctl requests:

       An attempt to change the physical address failed.

       An attempt to read the physical address failed.

       An attempt to add a new multicast address failed.

       mtmulti failed, multicast list full
       An attempt to add a new multicast address failed	 because  the  maximum
       number of multicast addresses has been reached.

       An attempt to read the board counters failed.

       The following messages occur while transmitting or receiving packets:

       de%d: buffer unavailable
       Packets	are  being  received  by the interface faster than they can be
       serviced by the driver.

       de%d: can't handle af%d
       The interface was handed a  message  with  addresses  formatted	in  an
       unsuitable address family; the packet was dropped.

See Also
       arp(4p), inet(4f), intro(4n)

				      VAX				 de(4)

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