Enhancing Network Performance under Single Link Failure with AS-disjoint BGP Extension Articles uri icon

authors

  • MANOLOVA, ANNA VASILEVA
  • RUEPP, SARAH RENÉE
  • ROMERAL ORTEGA, RICARDO

publication date

  • March 2010

start page

  • 129

end page

  • 134

issue

  • 3

volume

  • 9

International Standard Serial Number (ISSN)

  • 1109-2742

Electronic International Standard Serial Number (EISSN)

  • 2224-2864

abstract

  • This paper evaluates the performance of multi-domain networks under the Generalized Multi-Protocol Label Switching control framework in case of a single
    inter-domain link failure. We propose and evaluate a routing protocol extension
    for the Border Gateway Protocol, which allows domains to obtain two Autonomous
    System disjoint paths and use them efficiently under failure conditions. Three
    main applications for the protocol extension are illustrated: reducing traffic
    loss on existing connections by exploiting pre-selected backup paths derived
    with our proposal, applying multi-domain restoration as survivability mechanism
    in case of single link failure, and employing proper failure notification
    mechanisms for routing of future connection requests under routing protocol
    re-convergence. Via simulations we illustrate the benefits of utilizing the
    proposed routing protocol extension for networks employing different resilient
    mechanisms (both protection and restoration), as well as for networks which have
    not employed any resiliency technique. We show the need for differentiated
    failure handling for improving network performance under failure situations.
    Furthermore, we draw parallel between different network parameters and the
    efficiency of the applied notification and survivability strategies in the
    network.