Hierarchical Method of Inter-Area Fast Rerouting

Oleksandr Lemeshko 1 , Oleksandra Yeremenko 2  and Olena Nevzorova 1
  • 1 Kharkiv National University of Radio Electronics, Department of Infocommunication Engineering Kharkiv, Ukraine, 14 Nauka Ave., Ph./fax: +380577021320, Ukraine
  • 2 Kharkiv National University of Radio Electronics, Department of Infocommunication Engineering Kharkiv, Ukraine, 14 Nauka Ave., Ph./fax: +380577021320 , Ukraine

Abstract

In this paper, in order to increase the scalability and fault-tolerance of routing solutions the hierarchical method of inter-area fast rerouting in communication networks was presented. The method is based on the decomposed representation of the flow-based routing model with the introduction of the area interaction conditions to ensure connectivity of the inter-area routes. The model includes conditions for border routers protection, adapted for both single path and multipath routing. During the research it was established that the efficiency of the proposed method in terms of the speed of the coordinating procedure convergence was most influenced by the number of border routers and the implemented routing strategy.

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