1 .\" $NetBSD: bah.4,v 1.16 2008/04/30 13:10:55 martin Exp $
3 .\" Copyright (c) 1995, 1997 The NetBSD Foundation, Inc.
4 .\" All rights reserved.
6 .\" This code is derived from software contributed to The NetBSD Foundation
7 .\" by Ignatios Souvatzis.
9 .\" Redistribution and use in source and binary forms, with or without
10 .\" modification, are permitted provided that the following conditions
12 .\" 1. Redistributions of source code must retain the above copyright
13 .\" notice, this list of conditions and the following disclaimer.
14 .\" 2. Redistributions in binary form must reproduce the above copyright
15 .\" notice, this list of conditions and the following disclaimer in the
16 .\" documentation and/or other materials provided with the distribution.
18 .\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
19 .\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
20 .\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 .\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
22 .\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 .\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 .\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 .\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 .\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 .\" POSSIBILITY OF SUCH DAMAGE.
30 .\" The following requests are required for all man pages.
36 .Nd ARCnet network driver for SMC COM90C26 based boards
42 interface provides access to the 2.5 Mb/s ARCnet network via the
47 Each of the host's network addresses
48 is specified at boot time with an
51 The interface MTU is 507 for protocols that do not use link level fragmentation
52 and 60480 bytes for the others. The routing layer may specify additional
55 Currently supported protocols are IPv4(+ARP), and IPv6.
56 .Sh IP VERSION 4 CONSIDERATIONS
57 When the NOARP flag is set on the
60 it does not employ the address resolution protocol described in
62 to dynamically map between Internet and Ethernet addresses on the local
63 network. Instead, it uses the least significant 8 bits of the IP address
64 as hardware address, as described in RFC 1051 and RFC 1201.
66 With the IFF_LINK0 flag cleared, IP and ARP encoding is done according to the
67 deprecated, but popular among Amiga users, RFC 1051 encoding (that
68 is, with simple header, packet type 240 / 241), and the MTU is 507.
70 With the IFF_LINK0 flag set, IP/ARP/RARP encoding is done according to RFC 1201
71 (that is, with Packet Header Definition Standard header and packet type
72 212/213). The MTU is normally 1500.
74 When switching between the two modes, do a
75 .Cd ifconfig interfacename down up
78 When the IFF_LINK2 flag is set, ARP packets are sent with the protocol type
79 encoded as it would be in the ARCnet header, and decoded to the right protocol
80 encoding on reception. According to "assigned numbers", this is wrong, but
81 some legacy software (namely, AmiTCP 3.0beta) shows this bug.
85 interface supports the following Zorro II expansion cards:
86 .Bl -tag -width "AMERISTAR" -offset indent
88 Commodore's ARCnet card, manufacturer\ 514, product\ 9
90 Ameristar's ARCnet card, manufacturer\ 1053, product\ 9
101 .%T "Standard for the transmission of IP datagrams and ARP packets over ARCNET networks."
107 .%T "Transmitting IP traffic over ARCNET networks."
114 .%T "Transmission of IPv6 Packets over ARCnet Networks."
119 ARCnet Packet Header Definition Standard, Novell Inc., 1989
121 RFC 1051/RFC1201 with ARP, or without, using direct mapping of lower 8 IP
122 address bits instead.
127 interface first appeared in
129 ARP support was added in
132 .An Ignatios Souvatzis