Non-Weighted Interface Specific Routing for Load-Balanced Fast Local Protection in IP Networks
As a failure occurs, the affected traffic is quickly rerouted to backup paths for a network performing a fast protection scheme. Such a prompt reaction is aimed to reduce the damages caused by a failure. However, in some cases, the rerouted traffic may cause congestion along the backup paths which would lead to more packet losses than purely discarded affected flows. In this paper, the authors propose a load-balanced fast local protection scheme called Non-Weighted Interface Specific Routing (NISR) for determining the working and backup routing tables of IP routers. They jointly consider protection switching time, network survivability, and traffic load distribution together in the proposed scheme.