Figure - available from: International Journal of Communication Systems
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SEAL2 configuration example: A, constructing the SEAL2 core network as a PortLand fat‐tree structure (a PortLand k = 8 fat‐tree); B, detailed structure example for the (4x4)x(4x4) complete bipartite interconnection
Source publication
This paper presents the design and development of a new network virtualization scheme to support multitenant datacenter networking (MT‐DCN) based on software‐defined networking (SDN) technologies. Effective multitenancy supports are essential and challenging for datacenter networking designs. In this study, we propose a new network virtualization a...
Citations
... DHT provides scalability and other properties based on the logical association of overall network. However, sometimes, this logical organization of nodes in DHT [27] lacks some of the aspects like (1) network administrative domain boundaries, (2) inter-domain routing policies, and (3) physical network proximity. This paper uses a hierarchical pastry H-Pastry, a multi-level DHT scheme that uses the DHT pastry [28] and the canon approach and supports multihoming and peering relationships. ...
Software-defined networking (SDN) is a contemporary structural design paradigm that aspires to correct bandwidth-efficient usage and user application transparent interoperability. It claims to be self-motivated, convenient, affordable, and programmable. The network control may become directly programmable thanks to SDN architecture's decoupling of the network control and management plane from the data plane. Due to the centralized architecture of the SDN network, message propagation to various network devices in SDN is delayed. The SDN controller must thus establish new rules for each new communication. Peer-to-peer protocols are deployed in the system for the fast propagation of contents over the layered architecture. However, these protocols produce unwanted packets because these protocols mostly use a reactive routing protocol over an SDN architecture. This causes the delay for different applications due to inefficient bandwidth management. By offering resistance to connection failures and accommodating constantly changing bandwidth needs, it is difficult to control the needed bandwidth. This paper proposes a new technique using the Random Forest algorithm for efficient bandwidth management for peer-to-peer applications. In this technique, bandwidth usage of different applications is computed and predicted. So, according to the need of applications, network traffic is adjusted accordingly. An ultra-peer node is responsible for communication with other nodes in this methodology, eliminating unwanted traffic across the network. A Linux-based OpenvSwitch, POX controller and Mininet-based SDN-based network system are used for the tests. The results of the experiment demonstrate that the proposed framework may significantly improve QoS while outperforming the current bandwidth allocation algorithms in terms of success rate, throughput, response time, etc.
... Normal MAC addresses provide identification inside a LAN, but no location information. The authors of [41] propose adding extra meaning to MAC addresses so that they embed a tenant ID, and replace L2+L3 switching (combining intra-VLAN Ethernet switching with inter-VLAN IP switching) with a pure L2 forwarding scheme based on MAC addresses and MPLS labels. MAC addresses are used for VM identification and forwarding in local server groups under an "edge switch gateway". ...
OpenFlow is a network device management and monitoring protocol that has enabled research, experimentation and implementation of software-defined networks in general, and data center networks in particular. In this review, after describing the particularities of data center networks and OpenFlow technology, a collection of recent research papers integrating both topics is analyzed. The collection of proposals made by the authors whose research is reviewed is very broad. Most focus on traffic engineering, load balancing, congestion reduction and related topics, with the goal of optimizing data transfer by using all available resources. Other works focus on issues related to the multi-tenancy nature of these large networks, monitoring them, improving their security or modifying switch architecture specifically for data center networks. Overall, we have a panoramic view of the issues related to data center networking and the flexibility OpenFlow provides to help solve them.
