Improving Network Reliability with Keepalived    Tuesday, September 06 2005 @ 05:47 AM EDT Contributed by: glosser O'Reilly presents this tutorial on setting up Linux routers with redundancy. Redundancy is one of the key ways you can increase the reliability of your network. As the concept of RAID (redundant arrays of inexpensive disks) has shown, it can be much more cost effective to group a number of inexpensive components together than to spend much more money on one high-priced item. You can apply the same idea to your network: instead of investing in one very expensive proprietary router, why not install several redundant Linux routers made out of commodity parts and free software? This article shows how easy it is to do just that with Keepalived on Linux. Concepts The problem with routing is that most client computers do it in the simplest way possible: by using a default route. Any network traffic not destined for the local network goes happily onto the gateway router, assuming that it knows how to send it along appropriately. This makes the gateway a single point of failure for your network. If it goes down, none of your client machines can communicate with the outside world. Full tutorial   [ Views: 1529 ]

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