IP fast rerouting for single-link/node failure recovery

—Failure recovery in IP networks is critical to high quality service provisioning. The main challenge is how to achieve fast recovery without introducing high complexity and resource usage. Today’s networks mainly use route recalculation and lower layer protection. However, route recalculation could take as long as seconds to complete; while lower layer protection usually requires considerable bandwidth redundancy. We present two fast rerouting algorithms to achieve recovery from single-link and single-node failures, respectively. The idea is to calculated backup paths in advance. When a failure is detected, the affected packets are immediately forwarded through backup paths to shorten the service disruption. This paper answers the

• Type: Conference
• Year: 2007
• Where: BROADNETS
• Authors: Kang Xi, H. Jonathan Chao
• Keywords: Backup Paths, BROADNETS 2007, Computer Networks, Lower Layer Protection, Route Recalculation