Proposta e avaliação: algoritmos para gerência de banda e seleção de caminhos em redes MPLS (DS-TE)

Abstract

This work aims at proposing and evaluating a bandwidth sharing management algorithm among class types and a path selection algorithm for DiffServ Aware-MPLS Traffic Engineering (DS-TE) networks configured with RDM (Russian Doll Model) bandwidth constraint model. Initially, the technologies that offer Quality of Service (QoS) and Traffic Engineering (TE) in multiservice IP networks, together with the DS-TE architecture are introduced. The ADAPT-RDM and MinpreptDSTE algorithms are presented and the results of a performance evaluation done by simulation are discussed for different topologies networks scenarios. The simulation was done by a specific simulator developed in the scope of this work, with the specific proposal of evaluate the performance of the proposed algorithms. The results show that the ADAPT-RDM algorithm preserves the RDM model configuration for networks links independently of LSPs path selection criteria and network traffic level. The LSP path selection resulted by use of the MinpreptDSTE algorithm reduced the total number of LSPs preemptions, when compared with the minimum hops criteria used by the Constrained Shortest Path First (CSPF) algorithm