Date: Mon, 2 Dec 2002 11:23:01 +0100 From: Yann Berthier <yb@sainte-barbe.org> To: freebsd-net@FreeBSD.ORG Subject: Re: Multihoming - implementing RFC 1122 Message-ID: <20021202102301.GA63681@hsc.fr> In-Reply-To: <3DEB30D9.A290D483@it.uc3m.es> References: <200211282148.gASLmpas025733@sep.oldach.net> <3DEB30D9.A290D483@it.uc3m.es>
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On Mon, 02 Dec 2002, Juan Francisco Rodriguez Hervella wrote: > Helge Oldach escribió: > > > > All, > > > > I wonder whether there are plans to complete implementation of the > > "strong ES" model as described in RFC 1122 for multihoming hosts on > > FreeBSD. Essentially this would assure that a multihomed host would > > send and receive IP packets through the "correct" interface (that is, > > the physical interface that is configured with the IP address used in > > the packets). > > > > I don't like the strong ES model. IMHO, with weak ES model we can > obtain the best of multihoming benefits. the strong ES model > makes use of source routing, which might forbid the communication > where it could be possible. > > I don't see why a host should discard a packet for him, only > because it has arrived at other interface. I see good reasons indeed. For example when I bind a daemon on a given IP, I have sometimes good reasons to have the multihomed host discard packets coming from the 'wrong' interface. As long as the model (strong vs weak) is tunable via a sysctl (as it is already with net.inet.ip.check_interface), I think that this is the perfect behavior: I can select whatever fits best my needs in a given situation. Cheers, - yann To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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