From owner-freebsd-net@FreeBSD.ORG  Wed Jul 20 14:39:03 2011
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: freebsd-net@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 1458C1065670
	for <freebsd-net@freebsd.org>; Wed, 20 Jul 2011 14:39:03 +0000 (UTC)
	(envelope-from patfbsd@davenulle.org)
Received: from smtp.lamaiziere.net (net.lamaiziere.net [91.121.44.19])
	by mx1.freebsd.org (Postfix) with ESMTP id C78028FC18
	for <freebsd-net@freebsd.org>; Wed, 20 Jul 2011 14:39:02 +0000 (UTC)
Received: from mr12941.univ-rennes1.fr (mr129041.cri.univ-rennes1.fr
	[129.20.129.41])
	by smtp.lamaiziere.net (Postfix) with ESMTPA id 49D1163307B;
	Wed, 20 Jul 2011 16:19:25 +0200 (CEST)
Received: from mr12941 (localhost.localdomain [127.0.0.1])
	by mr12941.univ-rennes1.fr (Postfix) with ESMTP id B815D7A0108;
	Wed, 20 Jul 2011 16:19:24 +0200 (CEST)
Date: Wed, 20 Jul 2011 16:19:24 +0200
From: Patrick Lamaiziere <patfbsd@davenulle.org>
To: "Kim A. Brandt" <kimabrandt@gmx.de>
Message-ID: <20110720161924.26a4fcf0@mr12941>
In-Reply-To: <4E244EDD.2000709@peterhost.ru>
References: <4E243D8F.1020305@gmx.de>
	<4E244EDD.2000709@peterhost.ru>
X-Mailer: Claws Mail 3.7.8 (GTK+ 2.24.4; i686-pc-linux-gnu)
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: freebsd-net@freebsd.org
Subject: Re: CARP-interface fail-over in case required program fails.
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/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: Wed, 20 Jul 2011 14:39:03 -0000

Le Mon, 18 Jul 2011 19:18:53 +0400,
Dmitry Banschikov <d.banschikov@peterhost.ru> a écrit :

Hi,

> > is it possible to let a CARP-interface fail(-over) in the situation
> > when a certain program fails or stops working? I hope it's clear
> > enough what I have in mind. Could you give me any pointers on how
> > this can be archived?
> 
> You can write simple script, which will monitor status of the
> program, and if program fails, it can adjust advskew parameter of the
> CARP interface forcing going interface to the backup state.

In addition, port net/ifstated could be useful for doing this kind of
things (here we monitor BGP sessions with it).