qe(4)							     Kernel Interfaces Manual							     qe(4)

Name
       qe - 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 SIOCSIFADDR 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 minimize 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 packets.  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 Also
       arp(4p), inet(4f), intro(4n)

																	     qe(4)