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+.\" Copyright (C) 2011 Hiroki Sato <hrs@FreeBSD.org>.
+.\" All rights reserved.
+.\"
+.\" 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 PROJECT 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
+.\" PROJECT 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.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd July 14, 2011
+.Dt RTADVCTL 8
+.Os
+.Sh NAME
+.Nm rtadvctl
+.Nd control program for
+.Xr rtadvd 8 daemon
+.Sh SYNOPSIS
+.Nm
+.Op Fl v
+.Ar subcommand
+.Op Ar interface ...
+.Sh DESCRIPTION
+.Nm
+is a utility that communicates
+.Xr rtadvd 8
+daemon and displays information on Router Advertisement messages being
+sent on each interfaces.
+.Pp
+This utility provides several options and subcommands.
+The options are as follows:
+.Bl -tag -width indent
+.\"
+.It Fl v
+Increase verbose level.  When specified once, the
+.Nm
+utility shows additional information on prefixes, RDNSS, and DNSSL
+options.
+When twice, it shows information on inactive interfaces and
+some statistics.
+.El
+.Pp
+The subcommands are as follows:
+.Bl -tag -width indent
+.\"
+.It reload
+Specifies reloading the configuration file.
+.It shutdown
+Makes
+.Xr rtadvd 8
+daemon shut down immediately.
+.It show Op interfaces...
+Displays information on Router Advertisement messages being sent
+on each interfaces.
+.Sh SEE ALSO
+.Xr rtadv 8 ,
+.Xr rtadvd.conf 5
+.Sh HISTORY
+The
+.Nm
+command first appeared in
+.Fx 9.0 .
+.Sh BUGS
+The
+.Xr rtadvd 8
+daemon stops responding to
+.Nm
+for a while just after reloading the configuration file by the reload
+subcommand.
+This is because in the current implementation it cannot communicate
+with
+.Nm
+during sending some additional RAs for graceful transition from one
+configuration to another.
+It will take at most nine seconds for each interface.