Simon, On Mon, 2002-09-30 at 00:06, Simon Matthews wrote: > > OK, this may be a reasonable approach, but how do I force it initiate > connections from the "fast" interface, yet allow it to fail over to the > slow interface if the sytem removes the route to the fast gateway because > it has detected that it is not responding? The way I see things it basically works like this, the out going traffic will get balanced via the next hop and weights. So based on the weight values, one will be used more than the other. Now to get the same thing to happen from the outside world, you need to load balance your dns. Look into setting up multiple dns records, and possible weight values as well. It's pretty safe to say that if the fast connection goes down, it will be unavailable for the dns system to load balance, and all should divert to the line that is up. I would assume it to be best if using internal dns servers, but may work better with outside dns servers if possible? Now that's from the outside. You mentioned using dead gateway detection to remove, and hopefully add back the route when it becomes available again. Which will be needed so that the route is no longer used from the inside. Causing the route the is available to be the only one used from the inside. This switch over can be seamless, but if you are say streaming media, it will be interrupted, as an example. Other things like http, will most likely be fine, stateless things won't care, others will. You real problem is for say if a large download or something is diverted from a fast line to a slow line. I would imagine it to be somewhat unlikely since, the fast one may but in during the lookup process. You may want to look into some sort of traffic control or shaping, which may be a good idea in case that the fast line is down. You may really want to control the left over bandwidth for important stuff. Someone else also mentioned this. TC and QoS is not an area I have much experience in, so you will have to look to other there. In the end the over all load balancing logic is very general, and not extremely smart/advanced. It would be nice if it was. You have the next hops from the inside, and dns for the outside. Not to much beyond that. Beyond that you will have to look to other things to really dial things in, in my opinion. Not sure if this helps or not, but hopefully it will. Good luck -- Sincerely, William L. Thomson Jr. Support Group Obsidian-Studios Inc. 439 Amber Way Petaluma, Ca. 94952 Phone 707.766.9509 Fax 707.766.8989 http://www.obsidian-studios.com _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
