EX(4) BSD/vax Kernel Interfaces Manual EX(4)NAMEex — 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 Eth‐
ernet 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 set‐
ting 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 ALSOnetintro(4), inet(4), arp(4)HISTORY
The ex driver appeared in 4.3BSD.
4.2 Berkeley Distribution June 5, 1993 4.2 Berkeley Distribution
