Internet has become an essential infrastructure of communication.Limited survivability in the face of failure impairs the performance of Internet.Recent years

fast failure recovery of IP network has drawn much attention.As the state-of-art

there three ways to realize fast failure recovery of IP Networks:(1) to accelerate the convergence of IP routing;(2) to employ the proactive recovery strategy;(3) to increase the speed and accuracy of failure detection.This paper analyzes the defects of the existing solutions.In order to realize fast failure recovery of IP networks

we should:(1) balance the traffic load after recovery;(2) do interoperability test and redesign the routers' architecture.