Overlay routing efficiency during Internet outages

Internet communications may have strong reliability requirements and outages may thus have serious consequences. Recovery mechanisms are therefore deployed in networks to mitigate the effects of incidents that hit Internet. This paper proposes to study recovery mechanisms based on overlay routing. We are focusing on the ability for such systems to recover a failing communication, compared to traditional IP routing systems. We propose a model of these mechanisms behaviour deployed in several interconnected networks in reaction to different incidents. Our results point out that overlay routing can increase communications reliability and emphasize the importance of overlay nodes deployment.