1.\" Copyright (c) 1983, 1991, 1993 2.\" The Regents of the University of California. 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.\" @(#)qe.4 8.1 (Berkeley) 6/5/93 33.\" 34.Dd June 5, 1993 35.Dt QE 4 vax 36.Os BSD 4.3 37.Sh NAME 38.Nm qe 39.Nd 40.Tn DEC DEQNA 41.Tn Q-bus 4210 Mb/s Ethernet interface 43.Sh SYNOPSIS 44.Cd "device qe0 at uba? csr 174440 vector qeintr" 45.Sh DESCRIPTION 46The 47.Nm qe 48interface provides access to a 10 Mb/s Ethernet network through 49the 50.Tn DEC DEQNA 51.Tn Q-bus 52controller. 53.Pp 54Each of the host's network addresses 55is specified at boot time with an 56.Dv SIOCSIFADDR 57.Xr ioctl 2 . 58The 59.Nm qe 60interface employs the address resolution protocol described in 61.Xr arp 4 62to map dynamically between Internet and Ethernet addresses on the local 63network. 64.Pp 65The interface normally tries to use a 66.Dq trailer 67encapsulation 68to minimize copying data on input and output. 69The use of trailers is negotiated with 70.Tn ARP . 71This negotiation may be disabled, on a per-interface basis, 72by setting the 73.Dv IFF_NOTRAILERS 74flag with an 75.Dv SIOCSIFFLAGS 76.Xr ioctl . 77.Sh SEE ALSO 78.Xr netintro 4 , 79.Xr inet 4 , 80.Xr arp 4 81.Sh HISTORY 82The 83.Nm 84driver appeared in 85.Bx 4.3 . 86