3rd International ICST Conference on Broadband Communications, Networks, and Systems

Research Article

Capacity Requirements for the One-to-One Backup Option in MPLS Fast Reroute

  • @INPROCEEDINGS{10.1109/BROADNETS.2006.4374358,
        author={Ruediger Martin and Michael Menth and Korhan Canbolat},
        title={Capacity Requirements for the One-to-One Backup Option in MPLS Fast Reroute},
        proceedings={3rd International ICST Conference on Broadband Communications, Networks, and Systems},
        publisher={IEEE},
        proceedings_a={BROADNETS},
        year={2006},
        month={10},
        keywords={MPLS fast reroute  capacity planning  protection and restoration},
        doi={10.1109/BROADNETS.2006.4374358}
    }
    
  • Ruediger Martin
    Michael Menth
    Korhan Canbolat
    Year: 2006
    Capacity Requirements for the One-to-One Backup Option in MPLS Fast Reroute
    BROADNETS
    IEEE
    DOI: 10.1109/BROADNETS.2006.4374358
Ruediger Martin1,*, Michael Menth1,*, Korhan Canbolat1
  • 1: Department of Distributed Systems, Institute of Computer Science, University of W ¨urzburg, Germany
*Contact email: martin@informatik.uni-wuerzburg.de, menth@informatik.uni-wuerzburg.de

Abstract

MPLS fast reroute (MPLS-FRR) mechanisms deviate the traffic in case of network failures at the router closest to the outage location to achieve an extremely fast reaction time. We review the one-to-one backup and the facility backup that are options for MPLS-FRR to deviate the traffic via a detour or a bypass around the failed elements, respectively. Basically, the backup paths can take the shortest path that avoids the outage location from the point of local repair to the tail-end router or to the merge point with the primary path. We suggest two simple modifications that lead to a new path layout which can be implemented by one-to-one and by facility backup. We evaluate the backup capacity requirements, the length of the backup paths, and the number of backup paths per primary path in a parametric study regarding the network characteristics. Our proposals save a considerable amount of backup capacity compared to the standard mechanisms. They are suitable for application in practice since they are simple and conform to the standards.