SDN trials between Telefónica and Huawei were completed on commercially available Huawei products, such as routers, OTNs, and ROADM transport platforms, over IP and optical networking. These trials included multi-layer restoration, multi-domain Label Switched (LSP) path creation, online network survivability analysis, and more. The new elastic SDN architecture, based on IP and optical networking, utilizes a centralized controller, a user-network interface (UNI), Generalized Multiprotocol Label Switching (GMPLS), IP/MPLS, Path Computation Element Protocol (PCPE), and other key technologies to achieve centralized, multi-layer, multi-domain network control. This enables fast end-to-end service provisioning, multi-layer restoration for improved service availability and CAPEX savings, and online network monitoring for proactive maintenance.

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