Abstract

The control plane is the key element to utilize the full potential of Elastic Optical Networks (EONs). In this chapter, it is explained what are the functionalities of the control plane of a network, and the most popular control plane architecture, Generalized Multiprotocol Label Switching (GMPLS), is revisited. After the basics of routing, path computation, and signalling protocols are reviewed, the chapter explains how to architect a control plane to work in EONs. Moreover, the necessary extensions to the main GMPLS protocols to support EONs, including handling Bandwidth Variable Transponders (BVTs), are detailed. Finally, how to control a network with multiple domains is explained, focusing on the architecture and protocol improvements.

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