From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jason A. Pattie" Date: Wed, 17 Oct 2001 16:39:56 +0000 Subject: Re: [LARTC] Loadbalancing the gateway Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lartc@vger.kernel.org Of course, unless the other network knows how to route to the network your client resides on, and I'm sure it probably can't. Logu wrote: >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 > > >_______________________________________________ >LARTC mailing list / LARTC@mailman.ds9a.nl >http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://ds9a.nl/2.4Routing/ > -- Jason A. Pattie pattieja@pcxperience.com _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://ds9a.nl/2.4Routing/