Construction of the SDN Transport Network Model using the T-API Interface

The main purpose of the article is to present the SDN transport network in the form of a model that reflects the basic processes of the real network and allows you to manage service processes with a high degree of adequacy. It is important that the model reflects the basic set of services required to manage the transport network, such as network topology, available resources, element status information, query path calculation for future communications services, network event information, and changes. The main requirement for the model is representation using the principles of NFV (Network Function Virtualization). Then the solution of the tasks of managing such a network can provide a controller or a group of controllers SDN, regardless of the type of hardware implementation of network elements. For this the ONF (Open Networking Foundation) consortium has developed recommendations for building an open T-API. The aim of the article is to consider the principles of building a model of SDN optical transport network, functional architecture of T-API, the list of services needed to manage the transport network, the interaction of the orchestrator and controllers using T-API.