133 lines
4.3 KiB
Groff
133 lines
4.3 KiB
Groff
.\" $NetBSD: bah.4,v 1.16 2008/04/30 13:10:55 martin Exp $
|
|
.\"
|
|
.\" Copyright (c) 1995, 1997 The NetBSD Foundation, Inc.
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" This code is derived from software contributed to The NetBSD Foundation
|
|
.\" by Ignatios Souvatzis.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
.\" POSSIBILITY OF SUCH DAMAGE.
|
|
.\"
|
|
.\" The following requests are required for all man pages.
|
|
.Dd May 31, 1995
|
|
.Os
|
|
.Dt BAH 4 amiga
|
|
.Sh NAME
|
|
.Nm bah
|
|
.Nd ARCnet network driver for SMC COM90C26 based boards
|
|
.Sh SYNOPSIS
|
|
.Cd "bah* at zbus0"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
interface provides access to the 2.5 Mb/s ARCnet network via the
|
|
.Tn SMC
|
|
COM90C26 + COM90C32
|
|
ARCnet chip set.
|
|
.Pp
|
|
Each of the host's network addresses
|
|
is specified at boot time with an
|
|
.Dv SIOCSIFADDR
|
|
.Xr ioctl 2 .
|
|
The interface MTU is 507 for protocols that do not use link level fragmentation
|
|
and 60480 bytes for the others. The routing layer may specify additional
|
|
limits.
|
|
.br
|
|
Currently supported protocols are IPv4(+ARP), and IPv6.
|
|
.Sh IP VERSION 4 CONSIDERATIONS
|
|
When the NOARP flag is set on the
|
|
.Nm
|
|
interface,
|
|
it does not employ the address resolution protocol described in
|
|
.Xr arp 4
|
|
to dynamically map between Internet and Ethernet addresses on the local
|
|
network. Instead, it uses the least significant 8 bits of the IP address
|
|
as hardware address, as described in RFC 1051 and RFC 1201.
|
|
.Pp
|
|
With the IFF_LINK0 flag cleared, IP and ARP encoding is done according to the
|
|
deprecated, but popular among Amiga users, RFC 1051 encoding (that
|
|
is, with simple header, packet type 240 / 241), and the MTU is 507.
|
|
.Pp
|
|
With the IFF_LINK0 flag set, IP/ARP/RARP encoding is done according to RFC 1201
|
|
(that is, with Packet Header Definition Standard header and packet type
|
|
212/213). The MTU is normally 1500.
|
|
.Pp
|
|
When switching between the two modes, do a
|
|
.Cd ifconfig interfacename down up
|
|
to switch the MTU.
|
|
.Pp
|
|
When the IFF_LINK2 flag is set, ARP packets are sent with the protocol type
|
|
encoded as it would be in the ARCnet header, and decoded to the right protocol
|
|
encoding on reception. According to "assigned numbers", this is wrong, but
|
|
some legacy software (namely, AmiTCP 3.0beta) shows this bug.
|
|
.Sh HARDWARE
|
|
The
|
|
.Nm
|
|
interface supports the following Zorro II expansion cards:
|
|
.Bl -tag -width "AMERISTAR" -offset indent
|
|
.It Em A2060
|
|
Commodore's ARCnet card, manufacturer\ 514, product\ 9
|
|
.It Em AMERISTAR
|
|
Ameristar's ARCnet card, manufacturer\ 1053, product\ 9
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr arp 4 ,
|
|
.Xr inet 4 ,
|
|
.Xr intro 4 ,
|
|
.Xr ifconfig 8
|
|
.Rs
|
|
.%J RFC
|
|
.%N 1051
|
|
.%D March 1988
|
|
.%T "Standard for the transmission of IP datagrams and ARP packets over ARCNET networks."
|
|
.%A P.A. Prindeville
|
|
.Re
|
|
.Rs
|
|
.%J RFC
|
|
.%N 1201
|
|
.%T "Transmitting IP traffic over ARCNET networks."
|
|
.%A D. Provan
|
|
.%D February 1991
|
|
.Re
|
|
.Rs
|
|
.%J RFC
|
|
.%N 2497
|
|
.%T "Transmission of IPv6 Packets over ARCnet Networks."
|
|
.%A I. Souvatzis
|
|
.%D January 1999
|
|
.Re
|
|
.Pp
|
|
ARCnet Packet Header Definition Standard, Novell Inc., 1989
|
|
.Sh STANDARDS
|
|
RFC 1051/RFC1201 with ARP, or without, using direct mapping of lower 8 IP
|
|
address bits instead.
|
|
.Sh HISTORY
|
|
The
|
|
.Tn Amiga
|
|
.Nm
|
|
interface first appeared in
|
|
.Nx 1.1 .
|
|
ARP support was added in
|
|
.Nx 1.3 .
|
|
.Sh AUTHORS
|
|
.An Ignatios Souvatzis
|