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DE(4)											    DE(4)

       de - DEC DEUNA 10 Mb/s Ethernet interface

	    NDE  de_controllers # DEUNA

       The de interface provides access to a 10 Mb/s Ethernet network through a Digital Equipment
       UNIBUS Network Adapter (DEUNA).

       Each of the host's network addresses is specified at boot time with an SIOCSIFADDR  ioctl.
       The  de	interface employs the address resolution protocol described in arp(4P) to dynami-
       cally map between Internet and Ethernet addresses on the local network.

       The interface normally tries to use a ``trailer'' encapsulation to minimize  copying  data
       on input and output.  The use of trailers is negotiated with ARP.  This negotiation may be
       disabled, on a per-interface basis, by setting the IFF_NOTRAILERS flag  with  an  SIOCSIF-
       FLAGS ioctl.

       de%d:  hardware	address %s.  This is a normal autoconfiguration message noting the 6 byte
       physical ethernet address of the adapter.

       de%d: oerror, flags=%b tdrerr=%b (len=%d).  The hardware indicated an error  in	transmit-
       ting a packet to the cable.  The status and error flags are reported.

       de%d:  ierror,  flags=%b lenerr=%b (len=%d).  The hardware indicated an error in reading a
       packet from the cable.  The status and error flags are reported.

       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.

       de%d:  buffer  unavailable.  The interface received more packets than it had buffers allo-
       cated to receive them.

       de%d: address change failed, csr0=%b csr1=%b.  The interface was unable to  reprogram  its
       physical ethernet address.  This may happen with very early models of the interface.  This
       facility is used only when the controller is not the first  network  interface  configured
       for XNS.

       The  following messages indicate a probable hardware error performing the indicated opera-
       tion during autoconfiguration or initialization.  The two  control  and	status	registers
       should indicate the nature of the failure.  See the hardware manual for details.

       de%d: reset failed, csr0=%b csr1=%b.

       de%d: ppcb failed, csr0=%b csr1=%b.

       de%d: read addr failed, csr0=%b csr1=%b.

       de%d: wtring failed, csr0=%b csr1=%b.

       de%d: wtmode failed, csr0=%b csr1=%b.

       intro(4N), inet(4F), arp(4P)

3rd Berkeley Distribution		 August 20, 1987				    DE(4)
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