114 lines
4.0 KiB
Groff
114 lines
4.0 KiB
Groff
.\" $NetBSD: greconfig.8,v 1.5 1999/03/22 18:43:53 garbled Exp $
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.\"
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.\" Copyright 1998 (c) The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Heiko W.Rupp <hwr@pilhuhn.de>
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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. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the NetBSD
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.\" Foundation, Inc. and its contributors.
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.\" 4. Neither the name of the The NetBSD Foundation nor the names of its
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.\" contributors may be used to endorse or promote products derived
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.\" from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd 14 August 1998
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.Dt GRECTL 8
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.Os
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.Sh NAME
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.Nm greconfig
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.Nd set characteristics of the
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.Xr gre 4
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pseudo device.
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.Sh SYNOPSIS
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.Nm
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.Fl i Ar unit
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.Op Fl v
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.Nm ""
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.Fl i Ar unit
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.Op Fl d Ar dst
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.Op Fl s Ar src
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.Op Fl p Ar proto
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.Op Fl v
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.Sh DESCRIPTION
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.Nm
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is used to manipulate or display the characteristics of the
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.Xr gre 4
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tunnel device. The first form shown above displays the current
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parameters, while the second one sets parameters to new values.
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.Pp
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The options have the following meanings:
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.Bl -tag -width flag
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.It Fl i Ar unit
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Denotes the interface that is to be set/displayed. Unit is in the form
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``greN'' where N is an integer from zero to the maximum numbers of
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units. This option is always required.
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.It Fl d Ar dst
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Sets the IP address of the remote tunnel end. This may be the same as the
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tunnel destination set with
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.Xr ifconfig
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when IP packets are to be encapsulated.
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.It Fl s Ar src
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Sets the IP address of the local tunnel end. This may be the same as
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the tunnel gateway set with
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.Xr ifconfig
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when IP packets are to be encapsulated.
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.It Fl p Ar proto
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Sets the way how packets are encapsulated. Currently supported values are:
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.Bl -tag -width aaa
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.It 47 GRE encapsulation as described in RFC 1701,1702
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.It 55 MOBILE encapsulation as described in RFC 2004
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.El
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.It Fl v
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Give a little more verbose output when running
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.Nm .
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.El
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.Pp
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Note that the values for
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.Ar src ,
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.Ar dst ,
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.Ar proto
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must be coordinated with the remote end of the tunnel.
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.Pp
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For tunnels that run IP as encapsulated protocol, the tunnel endpoints
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can be set with the normal
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.Xr ifconfig .
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In this case, the encapsulation protocol can be chosen by giving
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``link0'' for IPIP encapsulation and ``-link0'' GRE encapsulation
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as arguments to
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.Xr ifconfig .
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.Sh SEE ALSO
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.Xr ifconfig 8 ,
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.Xr gre 4 ,
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.Xr protocols 5 ,
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.Xr netintro 4
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.Pp
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A description of GRE encapsulation can be found in RFC 1701, RFC 1702.
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.Pp
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A description of MOBILE encapsulation can be found in RFC 2004.
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.Sh AUTHOR
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Heiko W.Rupp <hwr@pilhuhn.de>
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