Look at Keepalived
Interesting article that talks about how to use keepalived to provide VRRP (Virtual Router Redundancy Protocol).
"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." Improving Network Reliability with Keepalived
(Submitted by Noel Fri Sep 2, 2005 )
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