From owner-freebsd-net@FreeBSD.ORG Fri Aug 1 15:56:49 2003 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 3506837B401 for ; Fri, 1 Aug 2003 15:56:49 -0700 (PDT) Received: from phoenix.gargantuan.com (rrcs-se-24-73-171-238.biz.rr.com [24.73.171.238]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2F73943FB1 for ; Fri, 1 Aug 2003 15:56:48 -0700 (PDT) (envelope-from michael@gargantuan.com) Received: from cyclops.gargantuan.com (cyclops.gargantuan.com [3ffe:c00:8034:a00::300]) by phoenix.gargantuan.com (Postfix) with ESMTP id 3D6D129B; Fri, 1 Aug 2003 18:56:47 -0400 (EDT) From: "Michael W. Oliver" To: "Oldach, Helge" Date: Fri, 1 Aug 2003 18:56:33 -0400 User-Agent: KMail/1.5.2 References: In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pgp-signature"; micalg=pgp-sha1; boundary="Boundary-02=_sAvK/rSS5P06lyM"; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <200308011856.45118.michael@gargantuan.com> cc: freebsd-net@freebsd.org Subject: Re: Multipath Routing X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: michael@gargantuan.com List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 01 Aug 2003 22:56:49 -0000 --Boundary-02=_sAvK/rSS5P06lyM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Description: signed data Content-Disposition: inline +--- On Friday, August 01, 2003 15:30, | Oldach, Helge proclaimed: | | > I am no programmer, so forgive my ignorance in that respect, but why | > can't a | > metric be used to differentiate routes to the same destination network | > within the routing table? I happened to be googling and found: | > | > http://daily.daemonnews.org/view_story.php3?story_id=3D3878 | > | > which describes a patch to -STABLE that does exactly what I am talking | > about. | | Routing will always follow the better metric. That's the paradigm. So | if you have two routes the one with the better metric will always rule. | What exactly is the syntax of entering a network route twice, using the sam= e=20 mask, via two different gateways, using different metrics? | Frankly, I don't quite see the rationale for such a hack. This can be | solved using available mechanisms such as VRRP (or HSRP, if the gateways | are decent routers). | In my case, I am talking about using FreeBSD as the router. For sure,=20 =46reeBSD + Zebra is one VERY powerful combination. | Furthermore: | | It doesn't detect when remote hosts are down. This is not the job of | the kernel. It's not a routing protocol, it's not an automatic failover | system. | | So what is this good for, that cannot be solved by already available | mechanisms? | As stated above, and in my first post, I am using Zebra, which is a suite o= f=20 routing protocols. It is aware of routing path changes. =2D-=20 +-------------------------------------+------------------------------+ | Michael W. Oliver, CCNP | "The tree of liberty must be | | IPv6 & FreeBSD mark | refreshed from time to time | | michael@gargantuan.com | with the blood of patriots | | http://michael.gargantuan.com/ | and tyrants." | | ASpath-tree, Looking Glass, etc. | - President Thomas Jefferson | | +------------------------------+ | gpg key - http://michael.gargantuan.com/gnupg/pubkey.asc | +--------------------------------------------------------------------+ --Boundary-02=_sAvK/rSS5P06lyM Content-Type: application/pgp-signature Content-Description: signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.2 (FreeBSD) iD8DBQA/KvAssWv7q8X6o8kRAuy2AKDA82739IvAGertpGT9G50okdSDbwCeNG+i wU8cGzYF3+bTissTDlJ7w1k= =wWYu -----END PGP SIGNATURE----- --Boundary-02=_sAvK/rSS5P06lyM--