Date: Mon, 18 Jul 2005 01:33:13 -0700 From: "Ted Mittelstaedt" <tedm@toybox.placo.com> To: "Mark" <mark@ice.net>, <questions@freebsd.org> Subject: RE: Question on Routing Message-ID: <LOBBIFDAGNMAMLGJJCKNCEAHFCAA.tedm@toybox.placo.com> In-Reply-To: <20050717030549.8182A43D45@mx1.FreeBSD.org>
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Quagga, which is the successor to Zebra, is what you use for BGP. However to speak BGP you must have an AS number. And for your advertisements to be worth a damn on the Internet, they have to be a minimum of a /24 since just about every transit ISP in the Internet filters route advertisements that are smaller than a /24, (such as a /25, /26, etc.) A /24 is 255 IP addresses. Also one other thing, even if you have a /24 and you succeed in advertising it, it is almost impossible to get bordering ISP's that are evenly matched. One of them will always be better connected than everyone else, and thus most traffic to you will come in on that link, since everyone routes traffic based on the shortest AS path length. Larger ISP's that have big allocations handle this problem by splitting up the advertisements on those allocations into smaller blocks, then divying those up with AS prepends. For example an ISP with a /19 might advertise it as 4 /21's, and on one feed might prepend 2 of the /21's and not prepend the other 2, and on another feed might prepend 1 of the /21's and not any of the others, etc. etc. There's a lot of experimentation to get a load properly balanced. I am guessing that if you don't already know that RIP isn't a routing protocol used to publish routes on the Internet, that you don't have much IP address space. I think you will find the costs to publish your routes will be an eye-opener. Ted >-----Original Message----- >From: owner-freebsd-questions@freebsd.org >[mailto:owner-freebsd-questions@freebsd.org]On Behalf Of Mark >Sent: Saturday, July 16, 2005 8:06 PM >To: questions@freebsd.org >Subject: Question on Routing > > >I'm looking for a reccomendation on the best software to >publish RIP routes >for IPSpace I own. > >I'm aware I'd have to get approval from my bordering routers to >allow me to >publish routes for public space, but I am just looking to >publish updated >routes (dynamically) via RIP or BGP from a FreeBSD based >system. I've seen >this done with gated, but at least for now I'd like to use a >free piece of >software. > > >Thanks, > >Mark > >_______________________________________________ >freebsd-questions@freebsd.org mailing list >http://lists.freebsd.org/mailman/listinfo/freebsd-questions >To unsubscribe, send any mail to >"freebsd-questions-unsubscribe@freebsd.org" >
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