Aurojit Panda

Fast Reroute (FRR) and other forms of immediate failover have long been used to recover from certain classes of failures without invoking the network con-trol plane. While the set of such techniques is growing, the limits of even the simplest such approach, which we call static failover routing, has not been adequately ex-plored. We present both positive and negative results on this natural form of routing resilience, and end with an open conjecture. 1