Multicast Dynamic Invulnerability Algorithm

This paper outlines a multicast dynamic invulnerability algorithm, which is implemented and be combined by dynamic calculation and FRR (Fast Rerouting).The global network topology information is immediately acquired and the corresponding backup is established to protect the fault tree branches, when the current routing is fault. This algorithm can realize real-time protection for dynamic path and it will save a lot of routing resources in the small failure probability network topology. This paper mainly analyzes and designs the realizing process, invulnerability link failures protection and node failure protection of multicast dynamic invulnerability algorithm.