de(4)de(4)Namede - DEUNA/DELUA Ethernet interface
device de0 at uba0 csr 0174510 vector deintr
The interface provides access to a 10 Mb/s Ethernet network through a
The host's Internet address is specified at boot time with an SIOCSI‐
FADDR ioctl. The interface employs the address resolution protocol
described in 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. This can be disabled for an
interface by setting the IFF_NOTRAILERS flag with an SIOCSIFFLAGS
ioctl. Trailers are only used for packets destined for Internet hosts.
The SIOCSPHYSADDR ioctl can be used to change and SIOCRPHYSADDR can be
used to read the physical address of the board.
SIOCADDMULTI and SIOCDELMULTI can be used to add or delete multicast
addresses. The board recognizes, at most, 10 multicast addresses. The
argument to these ioctls is a pointer to an ifreq structure found in
SIOCRDCTRS and SIOCRDZCTRS ioctls can be used to read or ``read and
clear'' the board counters. The argument to these two ioctls is a
pointer to a counter structure ``ctrreq'' found in
The ioctls SIOCENABLBACK and SIOCDISABLBACK can be used to enable and
disable the interface loopback mode.
The PUP protocol family is not supported.
de%d: command failed, csr0=%b csr1=%b
Here, command is one of reset, pcbb, rdphyad, wtring, or wtmode. This
message is printed if there is an error on device initialization. The
following command failures can occur during ioctl requests:
An attempt to change the physical address failed.
An attempt to read the physical address failed.
An attempt to add a new multicast address failed.
mtmulti failed, multicast list full
An attempt to add a new multicast address failed because the maximum
number of multicast addresses has been reached.
An attempt to read the board counters failed.
The following messages occur while transmitting or receiving packets:
de%d: buffer unavailable
Packets are being received by the interface faster than they can be
serviced by the driver.
de%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 Alsoarp(4p), inet(4f), intro(4n)