4.3BSD-UWisc/man/cat4/ex.4

EX(4)               UNIX Programmer's Manual                EX(4)



NAME
     ex - Excelan 10 Mb/s Ethernet interface

SYNOPSIS
     device ex0 at uba0 csr 164000 vector excdint

DESCRIPTION
     The _e_x interface provides access to a 10 Mb/s Ethernet net-
     work 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 _e_x 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'' encapsula-
     tion 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 SIOCSIFFLAGS ioctl.

DIAGNOSTICS
     ex%d: HW %c.%c, NX %c.%c, hardware address %s.  This pro-
     vides 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
     transmitting 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)





Printed 12/27/86          May 16, 1986                          1