qe(4)qe(4)Nameqe - DEQNA/DELQA Ethernet interface
Syntax
device qe0 at uba0 csr 0174440 vector qeintr
Description
The interface provides access to a 10 Mb/s Ethernet network through a
DEQNA/DELQA controller.
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 the
latter ioctls is a pointer to an ifreq structure found in <net/if.h>.
SIOCRDCTRS and SIOCRDZCTRS ioctls can be used to read or ``read and
clear'' the board counters. The argument to the latter 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.
Restrictions
The PUP protocol family is not supported.
Diagnostics
Various error messages can occur while transmitting or receiving pack‐
ets. For example,
qe%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)qe(4)
