EX
Section: Devices and Network Interfaces (4)
Updated: vax
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BSD 4.2
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(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.
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 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
netintro(4),
inet(4),
arp(4)
HISTORY
The
driver appeared in
BSD 4.3
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- DIAGNOSTICS
-
- SEE ALSO
-
- HISTORY
-
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