1.\" Copyright (c) 1983, 1991 The Regents of the University of California. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" from: @(#)qe.4 6.4 (Berkeley) 3/27/91 33.\" $Id: qe.4,v 1.2 1993/08/01 07:36:03 mycroft Exp $ 34.\" 35.Dd March 27, 1991 36.Dt QE 4 vax 37.Os BSD 4.3 38.Sh NAME 39.Nm qe 40.Nd 41.Tn DEC DEQNA 42.Tn Q-bus 4310 Mb/s Ethernet interface 44.Sh SYNOPSIS 45.Cd "device qe0 at uba? csr 174440 vector qeintr" 46.Sh DESCRIPTION 47The 48.Nm qe 49interface provides access to a 10 Mb/s Ethernet network through 50the 51.Tn DEC DEQNA 52.Tn Q-bus 53controller. 54.Pp 55Each of the host's network addresses 56is specified at boot time with an 57.Dv SIOCSIFADDR 58.Xr ioctl 2 . 59The 60.Nm qe 61interface employs the address resolution protocol described in 62.Xr arp 4 63to map dynamically between Internet and Ethernet addresses on the local 64network. 65.Pp 66The interface normally tries to use a 67.Dq trailer 68encapsulation 69to minimize copying data on input and output. 70The use of trailers is negotiated with 71.Tn ARP . 72This negotiation may be disabled, on a per-interface basis, 73by setting the 74.Dv IFF_NOTRAILERS 75flag with an 76.Dv SIOCSIFFLAGS 77.Xr ioctl . 78.Sh SEE ALSO 79.Xr netintro 4 , 80.Xr inet 4 , 81.Xr arp 4 82.Sh HISTORY 83The 84.Nm 85driver appeared in 86.Bx 4.3 . 87