Survivable Virtual SDN Embedding Approach for Innovative Cloud Data Network

Software-defined networking (SDN) has separated control and forwarding planes, which is a powerful approach to enable network virtualization by SDN hypervisors to share physical SDN networks among multiple virtual SDN in cloud data center. However, the centralized control and virtual network shared physical network are delicately weak and easy to failure if virtual topology embedding is not properly designed. This paper develops an enhanced virtual controller node mapping strategy to improve the survivability of virtual SDN. The strategy explicitly considers the network delay and the number of disjoint path between controller and forwarding devices to form survivable factor. Our proposed approach has been evaluated and the results show that the proposed technology has improved the survivability and network delay of virtual SDN while keeping the other within reasonable bounds.