From owner-freebsd-net@FreeBSD.ORG Wed Apr 30 19:44:27 2008 Return-Path: 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 5C338106567F for ; Wed, 30 Apr 2008 19:44:27 +0000 (UTC) (envelope-from SRS0=3651f749e0b1fec988a2721464be7e35dc7f3a59=687=es.net=oberman@es.net) Received: from postal1.es.net (postal3.es.net [IPv6:2001:400:14:3::8]) by mx1.freebsd.org (Postfix) with ESMTP id C72AE8FC1F for ; Wed, 30 Apr 2008 19:44:26 +0000 (UTC) (envelope-from SRS0=3651f749e0b1fec988a2721464be7e35dc7f3a59=687=es.net=oberman@es.net) Received: from ptavv.es.net (ptavv.es.net [198.128.4.29]) by postal3.es.net (Postal Node 3) with ESMTP (SSL) id KXW41925; Wed, 30 Apr 2008 12:44:25 -0700 Received: from ptavv.es.net (ptavv.es.net [127.0.0.1]) by ptavv.es.net (Tachyon Server) with ESMTP id 3225A45010; Wed, 30 Apr 2008 12:44:25 -0700 (PDT) To: Julian Elischer In-Reply-To: Your message of "Wed, 30 Apr 2008 10:25:51 PDT." <4818AB9F.7000607@elischer.org> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1209584665_28987P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Wed, 30 Apr 2008 12:44:25 -0700 From: "Kevin Oberman" Message-Id: <20080430194425.3225A45010@ptavv.es.net> X-Sender-IP: 198.128.4.29 X-Sender-Domain: es.net X-Recipent: ; ; ; X-Sender: X-To_Name: Julian Elischer X-To_Domain: elischer.org X-To: Julian Elischer X-To_Email: julian@elischer.org X-To_Alias: julian Cc: FreeBSD Net , Bruce M Simpson Subject: Re: multiple routing tables review patch ready for simple testing. X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 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, 30 Apr 2008 19:44:27 -0000 --==_Exmh_1209584665_28987P Content-Type: text/plain; charset=us-ascii Content-Disposition: inline > Date: Wed, 30 Apr 2008 10:25:51 -0700 > From: Julian Elischer > > Bruce M Simpson wrote: > > Julian Elischer wrote: > >> An interface may however be present in entries from multiple FIBs > >> in which case the INCOMING packets on that interface need to > >> be disambiguated with respect to which FIB they belong to. > > > > Yes, there is no way the forwarding code alone can do this. > > > > It should not be expected to, and it's important to maintain a clean > > functional separation there, otherwise one ends up in the same quagmire > > which has been plaguing a lot of QoS research projects over the years > > (Where do I put this bit of the system?) > > > >> > >> This is a job for an outside entity (from the fibs). > >> In this case a packet classifier such as pf or ipfw is ideal > >> for the job. providing an outside mechanism for implementing > >> whatever policy the admin wants to set up. > > > > Absolutely. This has been the intent from the beginning. > > > > There is no "one size fits all" approach here. We could put a packet > > classifier into the kernel which works just fine for DOCSIS consumer > > distribution networks, but has absolutely no relevance to an ATM > > backbone (these are the two main flavours of access for folk in the UK). > > > >[...] > > >> It > >> IS possible that an interface in the future might have a default > >> plane, but I haven't implemented this. > > > > > This limitation seems fine for now. > [...] > > > > > > For SSM, the key (S,G) > > what's SSM? Source Specific Multicast. It is a scheme for finding the source of a multicast stream without the need for MSDP. It is intended for broadcasting (in the radio/TV sense) streams from a single source. It is not suitable for conferencing as it can't work with multiple sources. -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman@es.net Phone: +1 510 486-8634 Key fingerprint:059B 2DDF 031C 9BA3 14A4 EADA 927D EBB3 987B 3751 --==_Exmh_1209584665_28987P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (FreeBSD) Comment: Exmh version 2.5 06/03/2002 iD8DBQFIGMwZkn3rs5h7N1ERAoFQAJ0bKR34GDW4c7b9rZnoh8mBzxJppwCfcpVa d0dvYqJDKqZ3zuJsBBYwvyc= =jWLj -----END PGP SIGNATURE----- --==_Exmh_1209584665_28987P--