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The increasing demand in the Internet network for real-time multimedia data traffic with high quality is pushing the limits of existing network structure. Optical Packet Switching (OPS) is considered as an attractive technology for future optical networks. Due to the high transmission capacity, network management is becoming more and more important. In this context, fault identification and performance monitoring are essential network management functions. This paper proposes a monitoring system that not only performs the failure detection, but also assesses the quality of a set of backup paths to infer the network state from the result of a set of end-to-end measurements. This feature allows service providers to establish new or backup paths based on quality requirements.
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