Multi-domain restoration with crankback in IP/MPLS networks

Multi-domain network survivability is a key problem area and crankback signaling offers a very viable alternative for post-fault restoration. However, although some initial multi-domain crankback studies have been done, most have not considered post-fault recovery. Along these lines, this paper proposes a novel solution framework for joint intra/inter-domain crankback restoration in realistic MPLS/GMPLS network settings. Namely, dynamic link failure and intra-domain link-state routing information is coupled with the available inter-domain path/distance vector routing state to improve the recovery process. Mechanisms are also introduced to limit crankback overheads and delays. The performance of the proposed solution is then analyzed using simulation.