.\"	$OpenBSD: qe.4,v 1.4 1999/06/05 13:18:39 aaron Exp $
.\"	$NetBSD: qe.4,v 1.3 1996/03/03 17:14:01 thorpej Exp $
.\"
.\" Copyright (c) 1983, 1991 The Regents of the University of California.
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
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.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\"    must display the following acknowledgement:
.\"	This product includes software developed by the University of
.\"	California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
.\"    without specific prior written permission.
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.\"     from: @(#)qe.4	6.4 (Berkeley) 3/27/91
.\"
.Dd March 27, 1991
.Dt QE 4 vax
.Os
.Sh NAME
.Nm qe
.Nd
.Tn DEC DEQNA
.Tn Q-bus
10 Mb/s Ethernet interface
.Sh SYNOPSIS
.Cd "device qe0 at uba? csr 174440 vector qeintr"
.Sh DESCRIPTION
The
.Nm qe
interface provides access to a 10 Mb/s Ethernet network through
the
.Tn DEC DEQNA
.Tn Q-bus
controller.
.Pp
Each of the host's network addresses
is specified at boot time with an
.Dv SIOCSIFADDR
.Xr ioctl 2 .
The
.Nm qe
interface employs the address resolution protocol described in
.Xr arp 4
to map dynamically  between Internet and Ethernet addresses on the local
network.
.Pp
The interface normally tries to use a
.Dq trailer
encapsulation
to minimize copying data on input and output.
The use of trailers is negotiated with
.Tn ARP .
This negotiation may be disabled, on a per-interface basis,
by setting the
.Dv IFF_NOTRAILERS
flag with an
.Dv SIOCSIFFLAGS
.Xr ioctl .
.Sh SEE ALSO
.Xr arp 4 ,
.Xr inet 4 ,
.Xr netintro 4
.Sh HISTORY
The
.Nm
driver appeared in
.Bx 4.3 .