1.\" $KAME: prefix.8,v 1.6 2001/02/04 05:20:48 jinmei Exp $ 2.\" 3.\" Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. Neither the name of the project nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" $FreeBSD: src/usr.sbin/prefix/prefix.8,v 1.2.2.10 2003/03/11 22:31:31 trhodes Exp $ 31.\" $DragonFly: src/usr.sbin/prefix/prefix.8,v 1.3 2007/11/21 19:12:41 swildner Exp $ 32.\" 33.Dd October 10, 1998 34.Dt PREFIX 8 35.Os 36.Sh NAME 37.Nm prefix 38.Nd configure network interface prefixes 39.Sh SYNOPSIS 40.Nm 41.Bk -words 42.Ar interface prefix 43.Ek 44.Bk -words 45.Op Cm set | delete 46.Ek 47.Sh DESCRIPTION 48The 49.Nm 50utility is used to assign a prefix 51to a network interface. 52This command is currently just a frontend of 53.Xr ifconfig 8 , 54and is not recommended to be used. 55.Sh SEE ALSO 56.Xr netstat 1 , 57.Xr netintro 4 , 58.Xr ifconfig 8 , 59.Xr rc 8 60.Sh HISTORY 61The 62.Nm 63utility first appeared in WIDE/KAME IPv6 protocol stack kit. 64Previously, this command was used to manipulate prefixes separately 65from interface identifiers, intending to be used for prefix 66renumbering. 67However, it had been known that the manipulation mechanism was not 68friendly with traditional address management engine in the kernel. 69Thus, the KAME developers decided to invalidate the prefix 70manipulation mechanism, and to clarify the entire address/prefix 71manipulation in February 2001. 72Since then, this command has almost been obsoleted. 73All users should now use 74.Xr ifconfig 8 . 75.Pp 76IPv6 and IPsec support based on the KAME Project 77.Pa ( http://www.kame.net/ ) 78stack was initially integrated into 79.Fx 4.0 80