Reducing Transient Disconnectivity Using Anomaly-Cognizant Forwarding

It is well known that BGP convergence can cause widespread temporary losses of connectivity resulting from inconsistent routing state. In this paper, the authors present Anomaly-Cognizant Forwarding (ACF) - a novel technique for protecting end-to-end packet delivery during periods of convergence. The preliminary evaluation demonstrates that ACF succeeds in eliminating nearly all transient disconnection after a link failure without the use of precomputed backup routes or altering the dynamics of BGP. It is widely known that BGP, the core Internet inter-domain routing protocol, is susceptible to temporary connectivity failures during periods of convergence.