Systems and methods for distinguishing a node failure from a link failure are provided. By strengthening the assumption of independent failures, bandwidth sharing among backup tunnels protecting links and nodes of a network is facilitated as well as distributed computation of backup tunnel placement....http://www.google.com/patents/US20030233595?utm_source=gb-gplus-sharePatent US20030233595 - Distinguishing between link and node failure to facilitate fast reroute
