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In this paper, the authors present a comparative study of the re-routing techniques to implement in a MPLS Network and finally reach a goal to achieve a fail-safe system with minimum loss of packets and lower service disruption. As they know that the IP protocols used today are designed to be robust and are therefore able to re-establish connectivity after almost any failure of network elements. Although, connectivity can be re-established, the time it takes to do so might not be in the limit for what is acceptable for high-priority services. For services that can't allow interruptions in the order of a few hundred milliseconds like voice over IP this cannot be met by today's Internet.
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