NAME
ex —
Excelan 10 Mb/s Ethernet
interface
SYNOPSIS
ex0 at uba0 csr 164000 vector excdint
DESCRIPTION
NOTE: This driver has not been ported from
4.4BSD yet.
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(2). The
ex interface employs the address resolution protocol
described in
arp(4) to
dynamically 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
SIOCSIFFLAGS
ioctl(2).
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 initialize
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
arp(4),
inet(4),
netintro(4)
HISTORY
The
ex driver appeared in
4.3BSD.