The virtual SDN networks (vSDNs) have emerged from the association of virtualization
and Software-Dened Networking (SDN), providing greater control and better
use of network resources. Several studies have already shown the feasibility and benets
of this approach. However, the issue still lacks solutions that can virtualize a network
in a scalable, intuitive and simplied manner. Thus, this thesis proposes an SDN approach
to network virtualization with the aim of reducing the limitations on vSDNs.
Therefore, it is suggested to adopt in network virtualization the separation between data
plans (distributed) and control (centralized), the global network view and use of ow
abstraction to manage the communication between the dierent points. To support our
proposition, three solutions were developed: the CIM-SDN (Common Information Model
for Software-Dened Networking), to enable the use of formal representation of the
new elements of vSDNs; The NVP (Network Virtualization Proxy), to provide greater
scalability by separating the control plane into centralized and decentralized parts; And
Graph Virtualization Layer (GVL), to provide greater use of abstractions between the
hypervisor and controllers, thereby simplifying the understanding and use of the network.
Proof of concept tests was carried out for the three proposed solutions, demonstrating the
feasibility of the approach.
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