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—Ethernet is becoming increasingly popular in metro and carrier-grade networks because of its cost-effectiveness, simplicity and scalability. Nevertheless, Ethernet was originally designed as a LAN technology, therefore, it lacks some features, such as fast fault-protection and sophisticated management, which are very important in the new carrier-grade(More)
Plug and play optical (PPO) nodes may be used to facilitate the deployment of optical networks. PPO nodes must be able to learn about the signal propagation properties of the surrounding optical fibers and make their wavelength-routing decisions based on the collected data. We discuss what are the open challenges that must be overcome to provide optical(More)
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