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135 lines
4.3 KiB
Groff
135 lines
4.3 KiB
Groff
.\" Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the project nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $Id: rtadvd.8,v 1.1.1.1 1999/08/08 23:31:42 itojun Exp $
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.\" $FreeBSD$
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.\"
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.Dd May 17, 1998
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.Dt RTADVD 8
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.Os KAME
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.Sh NAME
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.Nm rtadvd
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.Nd router advertisement daemon
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.Sh SYNOPSIS
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.Nm
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.Op Fl c Ar configfile
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.Op Fl P Ar policy
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.Op Fl dDfs
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.Ar interface ...
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.Sh DESCRIPTION
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.Nm Rtadvd
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advertises router advertisement packet to the specified
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.Ar interfaces .
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.Pp
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The program will daemonize itself on invocation.
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Then, it will voluntarily send router advertisement packet periodically.
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If a router solicitation packet from host has reached the program,
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the program will respond by router advertisement packet.
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.Pp
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For each interface, which is called advertising interface,
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content of router advertisement can be described in
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.Xr rtadvd.conf 5 .
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.Pp
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If there is no description for the interface in the configuration file
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or if the configuration file does not exist,
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.Nm
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sets all the parameters to their default values.
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In particular,
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.Nm
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gets all the interface routes from the routing table and advertises
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them as on-link prefixes.
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.Pp
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.Nm Rtadvd
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watches the routing table.
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By default, if an interface direct route is
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added/deleted on an advertising interface,
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.Nm
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adds/deletes the corresponding prefix to/from its advertising list,
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respectively.
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If you do not want to enable this feature, you should specify the
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.Ic Fl s
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command line option when advocation.
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.Pp
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.Nm Rtadvd
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can also receive router renumbering packets, and can do router
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renumbering for the system it runs on, as the contents of those
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packets.
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.Bl -tag -width indent
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.\"
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.It Fl c
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Specify an alternate location,
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.Ar configfile ,
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for the configuration file.
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By default,
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.Pa /etc/rtadvd.conf
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is used.
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.It Fl P
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Specifies that
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.Nm
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receives router renumbering messages. Also, specifies IPsec policy for
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rrenumd sessions. Because router renumbering can change the system's
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IPv6 prefix, its messages must be protected by IPsec. For details about
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.Ar policy ,
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please refer to
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.Xr ipsec 4
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and
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.Xr ipsec_set_policy 3 .
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.It Fl d
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Debug.
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.It Fl D
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More debug.
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.It Fl f
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Foreground mode.
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Do not become daemon.
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.It Fl s
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Static prefix.
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Do not watch the routing table.
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.El
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.Sh RETURN VALUES
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The program exits with 0 on success, and non-zero on failures.
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.Sh FILES
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.Bl -tag -width /etc/rtadvd.conf -compact
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.It Pa /etc/rtadvd.conf
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The default configuration file.
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.El
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.Sh SEE ALSO
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.Xr daemon 3 ,
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.Xr rtadvd.conf 5 ,
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.Xr rtsol 8
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.Sh HISTORY
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The
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.Nm
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command first appeared in WIDE Hydrangea IPv6 protocol stack kit.
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.Sh CAVEAT
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Do not perform router advertisement toward upstream direction,
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you should only advertise to downstream direction.
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If you advertise toward upstream by mistake,
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you will see icmp6 redirect storm on that subnet.
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This is because of the specification,
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which says that advertising router is assumed to become
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the default outgoing router for end hosts in the subnet.
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