DE(4)                                                                    DE(4)



NAME
       de - DEC DEUNA 10 Mb/s Ethernet interface

SYNOPSIS
       device de0 at uba0 csr 174510 vector deintr

DESCRIPTION
       The  _d_e 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  _d_e  interface employs the address resolution
       protocol described in _a_r_p(4P) 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.  The use of trailers is negoti‐
       ated  with  ARP.   This negotiation may be disabled, on a per-interface
       basis, by setting the IFF_NOTRAILERS flag with an SIOCSIFFLAGS ioctl.

DIAGNOSTICS
       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 transmitting 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 allocated 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 operation  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.

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



4.2 Berkeley Distribution        May 16, 1986                            DE(4)