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+.\" Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
+.\" 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.
+.\" 3. Neither the name of the project nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" 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.
+.\"
+.\"     $Id: ndp.8,v 1.2 1999/10/07 05:26:13 itojun Exp $
+.\"     $FreeBSD$
+.\"
+.Dd May 17, 1998
+.Dt NDP 8
+.Os KAME
+.\"
+.Sh NAME
+.Nm ndp
+.Nd control/diagnose  IPv6 neighbor discovery protocol
+.\"
+.Sh SYNOPSIS
+.Nm ndp
+.Fl a
+.Op Fl ntl
+.Nm ndp
+.Fl A Ar wait
+.Op Fl ntl
+.Nm ndp
+.Fl c
+.Op Fl nt
+.Nm ndp
+.Fl d
+.Op Fl nt
+.Ar hostname
+.Nm ndp
+.Fl f
+.Op Fl nt
+.Ar filename
+.Nm ndp
+.Fl H
+.Nm ndp
+.Fl i
+.Ar interface
+.Nm ndp
+.Fl p
+.Nm ndp
+.Fl P
+.Nm ndp
+.Fl r
+.Nm ndp
+.Fl R
+.Nm ndp
+.Fl s
+.Op Fl nt
+.Ar nodename
+.Ar ether_addr
+.Op temp
+.\"
+.Sh DESCRIPTION
+.Nm
+command manipulates the address mapping table
+used by Neighbor Discovery Protocol (NDP).
+.Bl -tag -width Ds
+.It Fl a
+Dump the currently existing NDP entries.
+.It Fl A Ar wait
+Repeat
+.Fl a
+.Pq dump NDP entries
+every
+.Ar wait
+seconds.
+.It Fl c
+Erase all the NDP entries.
+.It Fl d
+Delete specified NDP entry.
+.It Fl f
+Parse the file specified by
+.Ar filename .
+.It Fl H
+Harmonize consistency between the routing table and the default router
+list; install the top entry of the list into the kernel routing table.
+.It Fl i
+view ND information for specified interface.
+.It Fl l
+Do not truncate numeric IPv6 address.
+.It Fl n
+Do not try to resolve numeric address to hostname.
+.It Fl p
+Show prefix list.
+.It Fl P
+Flush all the entries in the prefix list.
+.It Fl r
+Show default router list.
+.It Fl R
+Flush all the entries in the default router list.
+.It Fl s
+Register a NDP entry for a node.
+.It Fl t
+Print timestamp on each entries,
+to make it possible to merge output with
+.Xr tcpdump 1 .
+Most useful when used with
+.Fl A .
+.El
+.\"
+.Sh RETURN VALUES
+.Nm Ndp
+will exit with 0 on success, and non-zero on errors.
+.\"
+.Sh SEE ALSO
+.Xr arp 8
+.\"
+.Sh HISTORY
+The
+.Nm
+command first appeared in WIDE Hydrangea IPv6 protocol stack kit.
+.\"
+.\" .Sh BUGS
+.\" (to be written)