The software-defined networking paradigm introduces interesting opportunities to operate networks in a more flexible yet formally verifiable manner. Despite the logically centralized control, however, a Software-Defined Network (SDN) is still a distributed system, with inherent delays between the switches and the controller. Especially the problem of changing network configurations in a consist...

Software-Defined Networking (SDN) as an emerging paradigm in networking divides the network architecture into three distinct layers such as application, control, and data layers. The multi-layered network architecture in SDN tremendously helps manage and control network traffic flows but each layer heavily relies on complex network policies. Managing and enforcing these network policies require...

As the most competitive solution for next-generation network, software-defined network (SDN) and its dominant implementation OpenFlow, are attracting more and more interests. But besides convenience and flexibility, SDN/OpenFlow also introduces new kinds of limitations and security issues. Of these limitations, the most obvious and maybe the most neglected one, is the flow table capacity of SDN...

Software Defined Networking (SDN) is an important approach to network design which uses software to enable networked systems to expand data flow control. Data centre is a facility used to house computer systems and associated components, such as telecommunication equipments, storage systems and backup systems. Networks are a critical component of data centres for getting efficient outputs / res...

The state-of-the-art OpenFlow technology only partially realized SDN vision of abstraction and centralization for packet forwarding in switches. OpenFlow/P4 falls short in implementing middlebox functionalities due to the fundamental limitation in its match-action abstraction. In this paper, we advocate the vision of Software-Defined Middleboxes (SDM) to realize abstraction and centralization f...

Data center networks (DCNs) rely heavily on the use of group communications for various tasks. For example, data center management utilities (e.g., software update/upgrade, log management, resource monitoring, scaling up or down of resources, access control etc.), collaborative applications (e.g., social media, project management tools, version control systems, etc.), multimedia applications an...

Software-defined networking (SDN) is being strongly considered as the next promising networking platform, and studies regarding SDN have been actively conducted accordingly. However, the security of SDN remains undefined and unknown when considering the enhancement of network security in SDN. In this paper, we verify whether SDN can enhance network security. Specifically, the idea of enabling s...

Software defined networking (SDN) is rapidly evolving technology which provides a suitable environment for easily applying efficient monitoring policies on the networks. SDN provides a centralized control of the whole network from which monitoring of network traffic and resources can be done with ease. SDN promises to drastically simplify network monitoring and management and also enable rapid ...

Software Defined Networking (SDN) is a new network architecture where network control is decoupled from forwarding and is directly programmable. However, existing techniques provide limited support for stateful forwarding in SDN data plane. Relying on the controller for all state maintaining gives rise to scalability and performance issues. In this paper, we present Stateful Forwarding Abstract...

The evolution of mobile telecommunication networks is accompanied by new demands for the performance, portability, elasticity, and energy efficiency of network functions. Network Function Virtualization (NFV), Software Defined Networking (SDN), and cloud service technologies are claimed to be able to provide most of the capabilities. However, great leap forward will only be achieved if resource...