On Mi, 2006-06-28 at 16:35 +0100, Andrew Lyon wrote: > Back to my original question then, is there anything in 2.6 or a patch for > 2.4 that could be used to do that? (4:3 ratio split of outgoing packets over > two interfaces/gateways). If you aren't afraid of patching & compiling kernels, there is one solution. It's a bit ugly, but works (we sell "bundled" DSL lines using this method). The basic idea is to use the iptables ROUTE target to make exemptions from the default gw. It works like this: First make a kernel with the netfilter random and ROUTE targets (can be obtained from patch-o-matic-ng, but they are removed from the current HEAD - you'd have to check out an older revision, or I could send you my copies which work with 2.6.16 and 2.6.17). Then, point the default route to the bigger pipe, and add an iptables rule like this: iptables -t mangle -A POSTROUTING -o (interface of default route) \ -m random --average 43 \ -j ROUTE --gw (ip of other gateway) I only tried this with different interfaces for different upstreams, but thinking about it, it should also work if they are on the same interface. 43% is about 3/7, so about 3/7 of your packets would use the slower line. Next thing to worry about would be the downstream :) Some remarks: - If you can make the downstream work the same way, you have true packet-based bundling, so single connections will also experience the full bandwidth. Depending on how the downstream is configured, different things can happen (only one line used, downstream bundled per-connection, downstream is 50/50 instead 43/57). - if the lines have different latencies, packets can arrive in different order, so e.g. VoIP won't be pleasure - connecting to the modems from your box will need some more rules (packets would also be sent to the modem you're not talking to) - I'm not 100% sure the random match options are right, I used the nth match for lines of equal sizes (so it's round-robin), not random. One could also use a cascade of nth matches to make it round-robin 4:3 (abababa abababa ...) Regards, Torsten _______________________________________________ LARTC mailing list LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
