4.3BSD - /usr/man/cat4/ex.0

EX(4)                                                                    EX(4)


NAME
       ex - Excelan 10 Mb/s Ethernet interface

SYNOPSIS
       device ex0 at uba0 csr 164000 vector excdint

DESCRIPTION
       The  ex interface provides access to a 10 Mb/s Ethernet network through
       an Excelan controller used as a link-layer interface.

       Each of the host’s network addresses is specified at boot time with  an
       SIOCSIFADDR  ioctl.   The  ex  interface employs the address resolution
       protocol described in arp(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
       ex%d: HW %c.%c, NX %c.%c, hardware address %s.  This provides  firmware
       revisions levels, and is expected during autoconfiguration.

       ex%d:  can’’t  initialize.   There  was  a  failure in allocating unibus
       resources for the device.

       ex%d: configuration failed; cc = %x.  The hardware indicated  an  error
       when  trying to initalize itself.  The error code returned is described
       at length in the device Reference Manual.

       ex%d: receive error %b.  The hardware indicated an error in  reading  a
       packet from the cable.  Specific Error bits are provided

       ex%d:  transmit error %b.  The hardware indicated an error in transmit‐
       ting a packet to the cable or  an  illegally  sized  packet.   Specific
       Error bits are provided

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


4.2 Berkeley Distribution        May 16, 1986                            EX(4)