A novel loop-free IP fast reroute algorithm

Although providing reliable network services is getting more and more important, currently used methods in IP networks are typically reactive and error correcting can take a long time. One of the most interesting solutions is interface based fast rerouting, where not only the destination address but also the incoming interface is taken into account during the forwarding. Unfortunately, current methods can not handle all the possible situations as they are prone to form loops and make parts of the network with no failure unavailable. In this paper we propose a new interface based routing method, which always avoids loops for the price of a bit longer paths. We also present extensive simulation results to compare current and proposed algorithms.