From owner-freebsd-net@FreeBSD.ORG  Fri Apr 17 13:29:32 2015
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: freebsd-net@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115])
 (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id 6E41A8F2
 for <freebsd-net@freebsd.org>; Fri, 17 Apr 2015 13:29:32 +0000 (UTC)
Received: from smtp.rlwinm.de (smtp.rlwinm.de [IPv6:2a01:4f8:201:31ef::e])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 32CEFA
 for <freebsd-net@freebsd.org>; Fri, 17 Apr 2015 13:29:32 +0000 (UTC)
Received: from crest.local (unknown [87.253.189.132])
 (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))
 (No client certificate requested)
 by smtp.rlwinm.de (Postfix) with ESMTPSA id 2AD02C89D
 for <freebsd-net@freebsd.org>; Fri, 17 Apr 2015 15:29:27 +0200 (CEST)
Message-ID: <55310AB6.9010105@rlwinm.de>
Date: Fri, 17 Apr 2015 15:29:26 +0200
From: Jan Bramkamp <crest@rlwinm.de>
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10;
 rv:31.0) Gecko/20100101 Thunderbird/31.6.0
MIME-Version: 1.0
To: freebsd-net@freebsd.org
Subject: Re: Multipoint GRE
References: <CAJMTyCHoxKt-fQuYD2ZKews5gctOtj6i0pPbAcQFSv84Lz1zjQ@mail.gmail.com>
In-Reply-To: <CAJMTyCHoxKt-fQuYD2ZKews5gctOtj6i0pPbAcQFSv84Lz1zjQ@mail.gmail.com>
Content-Type: text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding: 7bit
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-net>,
 <mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net/>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
 <mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 17 Apr 2015 13:29:32 -0000

On 17/04/15 05:02, Clint Armstrong wrote:
> Is it possible to create a point to multipoint GRE network on FreeBSD?
>
> On Linux I would do this by creating the GRE interface without a defined
> tunnel endpoint. Then by adding psudo-arp entries which map addresses on
> the GRE subnet with a tunnel endpoint address I can have multiple GRE
> tunnel destinations.
>
> Based on my testing so far, it looks like GRE on FreeBSD requires a single
> tunnel endpoint address. Is there any way around this?
>
I ran into the same limitation some time ago. On FreeBSD you need one 
GRE pseudo-interface per endpoint. The FreeBSD Kernel does not include  
GRE support.