Davide Cherubini - PhD Thesis - UniCA Eprints

7.3 The IBCN European networkFigure 7.2: The IBCN network topologyPhase u max % Gain (Def) % Gain (IS-IS) # LSPDefault u max = 70.64% – – 0IS-IS opt. u max = 53.71% 23.71% – 0MPLS opt. u max = 40.43% 42.77% 24.73% 822Table 7.4: GRP solution for the IBCN networkTable 7.4 shows that, using “default” metrics values, the maximum occupationis already above the 70% of the maximum link capacity. Conversely, using themetrics obtained with the Tabu Search IS-IS metrics optimization, the maximumlink occupation reduces to 53.71% with a gain of 23.71%.The LP model for the GRP finds a LSP distribution that pull down the69