Date: Mon, 02 Dec 2002 06:55:14 -0800 From: Lars Eggert <larse@ISI.EDU> To: Juan Francisco Rodriguez Hervella <jrh@it.uc3m.es> Cc: Helge Oldach <freebsdnet28nov02@oldach.net>, freebsd-net@FreeBSD.ORG, marcelo@it.uc3m.es Subject: Re: Multihoming - implementing RFC 1122 Message-ID: <3DEB7452.4090408@isi.edu> In-Reply-To: <3DEB30D9.A290D483@it.uc3m.es> References: <200211282148.gASLmpas025733@sep.oldach.net> <3DEB30D9.A290D483@it.uc3m.es>
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This is a cryptographically signed message in MIME format. --------------ms010405070606030407070006 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Juan Francisco Rodriguez Hervella wrote: > > 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. Layer 2 protocols do. Layer 3 has traditionally followed the weak host model, while layer 2 protocols usually follow the strong host model. Having the option of enabling strong host for layer 3 is beneficial for layer 3 VPNs, where IP is used as both link and network protocol. 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