From owner-freebsd-questions Wed Feb 16 21:47:26 2000 Delivered-To: freebsd-questions@freebsd.org Received: from builder.freebsd.org (builder.FreeBSD.ORG [204.216.27.24]) by hub.freebsd.org (Postfix) with ESMTP id 060C737B616 for ; Wed, 16 Feb 2000 21:47:24 -0800 (PST) (envelope-from cfedde@fedde.littleton.co.us) Received: from fedde.littleton.co.us (fedde.littleton.co.us [216.17.174.44]) by builder.freebsd.org (Postfix) with ESMTP id 0EDA6132EF for ; Wed, 16 Feb 2000 21:46:39 -0800 (PST) Received: from fedde.littleton.co.us (localhost.fedde.littleton.co.us [127.0.0.1]) by fedde.littleton.co.us (8.10.0.Beta10/8.10.0.Beta10) with ESMTP id e1H5l4V04540; Wed, 16 Feb 2000 22:47:04 -0700 (MST) Message-Id: <200002170547.e1H5l4V04540@fedde.littleton.co.us> To: Tony Rini - Network Operations Cc: questions@FreeBSD.ORG From: Chris Fedde Subject: Re: Cable and DSL Routing In-reply-to: Your message of "Wed, 16 Feb 2000 11:19:40 PST." <38AAF84C.EB4AEFC9@thegrid.net> Date: Wed, 16 Feb 2000 22:47:04 -0700 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Tony Rini - Network Operations writes: +--------------- | DSL --\ | |---- FBSD---Hub--My Internal Lan | Cable-/ +--------------- I'd re-draw this as follows +------------+ +-ISPA---DSL-----+xl0 | Internet-+ | FBSD fxp0+-----[hub]--+ home lan +-ISPB---Cable---+xl1 | +------------+ A single inbound tcp connection is not going to balance traffic between the two links. Traffic will traverse the link associated with the destination IP address. This means that Internet content for a single session will only download at the data rate associated with that link, not at the sum of the two links. If you have lots of users on the "home lan" and are sufficiently clever then you might figure out a way to play with source addresses and balance sessions over the links. Then on average your loading may approach the sum of the two bandwidths but still any single session receives the available bandwidth of one link. If you have LOTS of outbound traffic then perhaps you can set up your webservers or MTAs so that they bind to the appropriate IP addresses on the box. Then you can probably flood both links with pictures or commercial e-mail until one or both ISP's shut you down. BTW. Dynamic Internet backbone routing is a bit complex. It is significantly more complex than simply setting up routed to listen for rip broadcasts then route them. Not only are there technical issues such as the shear size of the routing table (> 75,000 routes) but there are financial, political and even theological issues that will come into play before this setup is operational. Install MRTG from the ports collection and turn on an the agent. Set MRTG up to watch the traffic on your interfaces and watch your traffic patterns. If nothing else you will get some numbers to use in your arguments with your ISPs :-) chris __ Chris Fedde 303 773 9134 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message