1.\" Copyright (c) 1986, 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.\" @(#)ex.4 8.1 (Berkeley) 6/5/93 33.\" 34.Dd June 5, 1993 35.Dt EX 4 vax 36.Os BSD 4.2 37.Sh NAME 38.Nm ex 39.Nd Excelan 10 Mb/s Ethernet interface 40.Sh SYNOPSIS 41.Cd "device ex0 at uba0 csr 164000 vector excdint" 42.Sh DESCRIPTION 43The 44.Nm ex 45interface provides access to a 10 Mb/s Ethernet network through 46an Excelan controller used as a link-layer interface. 47.Pp 48Each of the host's network addresses 49is specified at boot time with an 50.Dv SIOCSIFADDR 51.Xr ioctl 2 . 52The 53.Nm ex 54interface employs the address resolution protocol described in 55.Xr arp 4 56to dynamically map between Internet and Ethernet addresses on the local 57network. 58.Pp 59The interface normally tries to use a 60.Dq trailer 61encapsulation 62to minimize copying data on input and output. 63The use of trailers is negotiated with 64.Tn ARP . 65This negotiation may be disabled, on a per-interface basis, 66by setting the 67.Dv IFF_NOTRAILERS 68flag with an 69.Dv SIOCSIFFLAGS 70.Xr ioctl . 71.Sh DIAGNOSTICS 72.Bl -diag 73.It "ex%d: HW %c.%c, NX %c.%c, hardware address %s." 74This provides firmware revisions levels, and is expected during 75autoconfiguration. 76.Pp 77.It ex%d: can't initialize. 78There was a failure in allocating unibus resources for the device. 79.Pp 80.It "ex%d: configuration failed; cc = %x." 81The hardware indicated an error when trying to initalize itself. 82The error code returned is described at length in the device 83Reference Manual. 84.Pp 85.It ex%d: receive error %b. 86The hardware indicated an error 87in reading a packet from the cable. 88Specific Error bits are provided 89.Pp 90.It ex%d: transmit error %b. 91The hardware indicated an error 92in transmitting a packet to the cable or an illegally sized packet. 93Specific Error bits are provided 94.Pp 95.It ex%d: can't handle af%d. 96The interface was handed 97a message with addresses formatted in an unsuitable address 98family; the packet was dropped. 99.El 100.Sh SEE ALSO 101.Xr netintro 4 , 102.Xr inet 4 , 103.Xr arp 4 104.Sh HISTORY 105The 106.Nm 107driver appeared in 108.Bx 4.3 . 109