On Thu, Jul 20, 2000 at 06:48:21PM -0300, Charrua wrote: > Hi all, > > > We have 2 different dedicated Internet connections (with two different > > carriers). Naturally, each connection has different groups of IP > > addresses. Each of the connections has a Cisco 1601 router at our end. > > 1. We would like to use a Linux PC to balance the load (of outgoing > > traffic from our backbone to the Internet) between the two connections. > > > > Someone told us that creating two default routes in the Linux machine, we > > could achieve that goal (one default route would point to the router from > > carrier "A", and the other default route would point to the router from > > carrier "B". In this way we would accomplish that one outgoing packet be > > sent through one of the routers and the next packet through the other > > router. > > > > When we tried this, the Linux machine sent ALL outgoing packets through > > the second default route (the last default route that we had created). > > > > The questions are: > > - Should this work ? > > - If so, is it necessary to recompile the kernel, or are we doing > > something wrong ? You probably want to compile routing multipath support in: IP: equal cost multipath CONFIG_IP_ROUTE_MULTIPATH Normally, the routing tables specify a single action to be taken in a deterministic manner for a given packet. If you say Y here however, it becomes possible to attach several actions to a packet pattern, in effect specifying several alternative paths to travel for those packets. The router considers all these paths to be of equal "cost" and chooses one of them in a non-deterministic fashion if a matching packet arrives. I did look very deeply at the code, but from the comments it looks like the "nondeterministic fashion" actually produces a weighted division of outgoint traffic. > > 2. Does anyone know how to balance incoming traffic to our backbone ? > > (Without having an autonomous system, which we don't have and are far > > from having). This is more difficult (or I did not understand what you meant). Could you please elaborate on this? Regards, -- Andrea Glorioso sama(at)aglorioso(dot)com Padua, Italy - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.rutgers.edu
