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OpenFlow Discovery Protocol (OFDP) is the defacto protocol used by OpenFlow controllers to discover the underlying topology. In this paper, we show that OFDP has some serious security, efficiency and functionality limitations that make it non suitable for production deployments. Instead, we briefly introduce sOFTD, a new discovery protocol with a built-in security characteristics and which is more...
For network managers, it is important to find the burst network traffic as soon as possible. However, most network monitoring system can not find the source of the problematic flow in a short time. In this paper, we design an efficient realtime deep packet inspection (DPI) monitoring system, which can help us observe not only the topology but also the protocol such as Facebook or Google. To make the...
Software Defined Networking (SDN) is a paradigm shift technology in networking. However, it is not practical to remove existing networks for building SDN networks or to replace all operating network devices with SDN-enabled devices. Therefore, SDN migration, which implies co-existing techniques and gradually moving to SDN, is an important issue. In this paper, we focus on how to integrate SDN networks...
Overlay-based network virtualization has been getting attention to realize multi-tenant datacenters. But the multi-tenant property makes broadcast/multicast communications on virtual networks difficult. In this paper, we propose TE-Cast (Topology Embedded xCast) that supports generic broadcast/multicast communications on virtual networks. Unlike existing similar methods, TE-Cast can reduce traffic...
Software Defined Networking (SDN) is the potential future backbone of all computer networking. The main advantage of SDN is that it separates the control plane from the data plane. This delegates switching/routing decisions to a controller that is connected to the switches. The connectivity of the switches and controllers can be represented as a network topology. Usually a network topology has to...
Software Defined Network (SDN) is one of the emerging architecture that has captured the attention of networking technology enthusiasts and organizations worldwide. SDN enables programmability of the network, simplifies network management and provides better scope for research. The programmability of the network has made it possible to create software based network components such as hubs, switches...
With the emergence of significant amounts of mobile and cloud services, the scale of Data Center Networks (DCNs) has been growing rapidly. A DCN has different network requirements compared to a traditional Internet Protocol (IP) network, and the existing Ethernet/IP style protocols constrain the DCNs scalability and its manageability. In this paper, we present a scalable failover method for large...
Software defined networking (SDN) provides techniques to facilitate the management of computer networks in a centralized and integrated architecture by separating the control plane from the data plane in packet forwarding devices and middleboxes. By creating this abstraction layer, SDN allows control of network middleboxes remotely from a controller point, which is either connected directly (out-of-band...
Openflow is an "open" protocol to enable communication between a Software defined Network controller and network elements. Openflow enables the controller to create flow table entries in the switches, and also enables the analysis for underlying network topologies. The Mininet provides a simple and inexpensive network test-bed for developing Openflow applications. The default version of...
In this paper, we design an architecture to implement a QoS system based on OpenFlow. The system can filter malicious packets that have no permission to gain quality of service, and can guarantee scheduling the fastest path for QoS packets in working network. By predicting and estimating current network flows, we implement to assign optimal path for QoS flow without affecting the rest of the normal...
Today, Data Center Networks (DCNs) are re-architected in different new architectures in order to alleviate several emergent issues related to server virtualization and new traffic patterns, such as the limitation of bi-section bandwidth and workload migration. However, these new architectures will remain either proprietary or hidden in administrative domains, and interworking protocols will remain...
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