Fast IP Network Recovery using MRC

Internet takes vital role in our communications infrastructure, due to slow convergence of routing protocols after network failure become a budding problem. To assure fast recovery scheme from link and node failure in networks, we present a new recovery scheme called Multiple Routing Configuration (MRC). Our anticipated scheme guarantees recovery in all single failure scenarios, using a mechanism to handle both link and node failures, and without knowing the root cause of the failure. MRC is strictly connectionless, and assumes only destination based hop-by-hop forwarding. MRC is based on keeping additional routing information in the routers, and allows packet forwarding to continue on an alternative output link immediately after the detection of a failure. In this paper we present MRC, and analyze its performance with respect to load distribution after a failure. We also show how an estimate of the traffic demands in the network can be used to improve the distribution of the recovered traffic, and thus reduce the chances of congestion when MRC is used.