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The Impact of Backup Routes on the Routing and Wavelength Assignment Problem in WDM Networks

The performance of WDM networks are usually analyzed through the blocking probability of a pool of requests. It is argued that alternative routes can have a significant impact on the blocking probability of a WDM network. In this work, we analyze the impact of alternative routes in mesh and ring topologies. The results show that, contrary to what would be expected, having alternative routes may have a negative impact in certain cases.