From owner-freebsd-net@FreeBSD.ORG Wed May 19 03:57:13 2004 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id BE1E316A4CE for ; Wed, 19 May 2004 03:57:13 -0700 (PDT) Received: from tigra.ip.net.ua (tigra.ip.net.ua [82.193.96.10]) by mx1.FreeBSD.org (Postfix) with ESMTP id DA4F043D1D for ; Wed, 19 May 2004 03:57:12 -0700 (PDT) (envelope-from ru@ip.net.ua) Received: from heffalump.ip.net.ua (heffalump.ip.net.ua [82.193.96.213]) by tigra.ip.net.ua (8.12.11/8.12.11) with ESMTP id i4JB2Clm079669 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 19 May 2004 14:02:13 +0300 (EEST) (envelope-from ru@ip.net.ua) Received: (from ru@localhost) by heffalump.ip.net.ua (8.12.11/8.12.11) id i4JAukhu025253; Wed, 19 May 2004 13:56:46 +0300 (EEST) (envelope-from ru) Date: Wed, 19 May 2004 13:56:46 +0300 From: Ruslan Ermilov To: Eugene Grosbein Message-ID: <20040519105646.GB25177@ip.net.ua> References: <40A9CF72.85E2EC9D@kuzbass.ru> <20040518105134.GC70919@ip.net.ua> <20040518140857.GC20471@grosbein.pp.ru> <20040518151506.GC72684@ip.net.ua> <40AB35DE.DF743CCB@kuzbass.ru> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="H+4ONPRPur6+Ovig" Content-Disposition: inline In-Reply-To: <40AB35DE.DF743CCB@kuzbass.ru> User-Agent: Mutt/1.5.6i X-Virus-Scanned: by amavisd-new X-Spam-Checker-Version: SpamAssassin 2.55 (1.174.2.19-2003-05-19-exp) cc: Eugene Grosbein cc: net@FreeBSD.org Subject: Re: multicast arp entry X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 19 May 2004 10:57:13 -0000 --H+4ONPRPur6+Ovig Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, May 19, 2004 at 06:24:30PM +0800, Eugene Grosbein wrote: > Ruslan Ermilov wrote: >=20 > > > > The long answer could be: you could join to a single multicast > > > > group on multiple interfaces, and you will be able to receive > > > > multicast on all of them, but if you don't have multicast > > > > forwarding enabled, only one interface will be used for sending. > > > > > > That's bad. How do I enable "multicast forwarding", or, in other word= s, > > > do you know why ripd doesn't do it for be? > > > > > I use mrouted(8). > >=20 > > > On the other hand, I've got another machine with very simple configur= ation: > > > one fxp0 interface, one rl0 and one gif0 and started quagga/ripd. > > > Two points: tcpdump shows that multicasts go out all three interfaces > > > with right source IP and there is no arp entries for 224.0.0.9 and 22= 4.0.0.1. > > > > > > I couldn't find what is the vital difference between these two machin= es yet > > > (there are so many of them). > > > > > I don't know. Perhaps, quagga/ripd send raw IP packets in this case. >=20 > No, it does not. >=20 > I've finally found that one need not MROUTING and mrouted just to send > RIPv2 multicasts out via several interfaces and FreeBSD does it right > by default. But if outgoint multicast packet is diverted to ipacctd > accounting daemon using 'ipfw divert' then it is sent to an interface > pointed by route to 224.0.0.9 instead of right one > (no such effect for P2P interfaces, though). >=20 Care to share the experience of how you were able to send multicasts out several interfaces without tmulticast forwarding using mrouted(8) or its equivalent? Cheers, --=20 Ruslan Ermilov ru@FreeBSD.org FreeBSD committer --H+4ONPRPur6+Ovig Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iD8DBQFAqz1uUkv4P6juNwoRAr8qAJ9YpdY0ykGKpGOQkJKMRDdWxFIRkwCeJXKm En/LF1Kq4lg99PMwsBvN/4A= =JWQE -----END PGP SIGNATURE----- --H+4ONPRPur6+Ovig--