Hi Jason, thanks for your response. I am not able to ping outside from client machines. I have a doubt. If the client and router is on different network, is it necessary to implement NATing. > You actually only have two connections then that Linux can see. One, > I'm assuming, is a router that has multiple connections to the ISP which > it assigns as the same IP address (multi-line ISDN is similar). > > You will need to setup your multipath default route like so on the Linux > box: > > If eth0 is assigned 172.16.1.2 on your Linux router, then > > ip route add default nexthop via 172.16.1.204 dev eth0 nexthop via > 172.16.1.205 dev eth0 > > If you want to make one route work more than the other, you can assign > weights to the routes right after each dev entry in the route statement > (i.e., "ip route ... dev eth0 weight 2 ... dev eth0 weight 1", this > would send twice as many connections out the first route as the second > route). Remember that if you do not use the 'equalize' modifier to the > route statement, you get traffic broken up across the links on a per > session basis. If using the 'equalize' parameter, it will be broken > across the links on a per packet basis. > > Logu wrote: > > >Hi, > >This is my network > >My LAN IP is 172.16.1.0/255.255.255.0 > >I have two router which has LAN IP 172.16.1.204 and another one 172.16.1.205 > >My Linux machine IP is 172.16.1.1. > >I have two interface for linux machine one is conected to switch where all > >my windows machines are connected and another one 172.16.1.2 is connected to > >hub where my routers are connected > >I set windows machines gateway as 172.16.1.1 > > > >Now how should i activate multipath routing > > > >-Logu > >>You might try multi-path routing. It doesn't exactly load balance the > >>lines, as in aggregating the bandwidth together, but it does allow N > >>number of simultaneous connections (where N would be the maximum number > >>of different routes you have). > >> > >>In your scenario, let's say you have the 3 routers with IP addresses of > >>1.1.1.1/30, 2.2.2.2/30, and 3.3.3.3/30. Now, you have your Linux > >>firewall/gateway/router/thingy between the routers and the client. On > >>your Linux box, you could have 3 separate network cards each connected > >>to one of the routers, or you could have a single network card connected > >>to all three routers via a hub or switch (switch would probably be > >>better). Let's say you have one network card. In that scenario, you > >>would assign an IP address in each of the network ranges for the each of > >>the routers. I.e., 1.1.1.2/30, 2.2.2.3/30, 3.3.3.4/30 (note: these IP > >>address are probably completely incorrect for assignment in the network > >>range I have chosen, just using them as examples; you would get usable > >>IP's from your ISP). To assign these IP address, use the 'ip' command. > >> > >>ip addr add 1.1.1.2/30 brd + dev eth0 > >>ip addr add 2.2.2.3/30 brd + dev eth0 > >>ip addr add 3.3.3.4/30 brd + dev eth0 > >> > >>Now, you will need to setup the multi-path route as your default route. > >> You can specify the 'equalize' parameter if you like, but I have found > >>that it doesn't do exactly what you might expect it to do. > >> > >>ip route add default nexthop via 1.1.1.1 dev eth0 \ > >> nexthop via 2.2.2.2 dev eth0 \ > >> nexthop via 3.3.3.3 dev eth0 > >> > >>And that should take care of that. Now all of this is assuming that you > >>have multiple, different IP ranges for your 3 ISDN lines. If they are > >>all in the same network range, you can forego having 3 IP's assigned to > >>the same network card on your firewall. In that case you would only > >>need one. Then substitue appropriately for the router IP addresses. > >> > >>Logu wrote: > >> > >>>Hi, > >>>I have 3 isdn connections. Is it possible to loadbalace the bandwidth > >>> > >using > > > >>>a linux box in between the routers and the client. I will be very much > >>>greatful to you if someone helps me in this. > >>> > >>>-Logu > >>> _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com
