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Network Functions Virtualization allows Communication Service Providers to extend their traditional service portfolio to new models of service offerings, such as Virtualized Network Functions as a Service (VNFaaS), in which network functions can be traded following the “on-demand” Cloud paradigm. Incremental deployment and interoperability with legacy infrastructure, in particular Wide Area Network...
With the flexibility and programmability levels offered by Network Functions Virtualization (NFV), it is expected to catalyze the upcoming “softwarization” of the network through software implementation of networking functionalities on virtual machines (VMs). While looking into the different issues thrown at NFV, numerous works have demonstrated how performance, power consumption and, consequently,...
The continuous evolution of the telecommunication network architecture has made their network functions to become more available and utilizable. With SDN/NFV network service providers can program their own network functions on the standard commercial hardware platform. SDN/NFV enable more efficient utilization of resources and better service agility. It supports new network services faster and less...
GTS is a new service in GÉANT that allows users to set up wide-area virtual networks via a web-based automatic provisioning system. The virtual networks are built within minutes over the underlying physical infrastructure and thus allow the researcher to carry out network experiments with great flexibility and enable rapid prototyping and innovation. The individual network environments are isolated...
Network Functions Virtualization (NFV) is an emerging initiative where standard IT virtualization evolves to consolidate network functions onto high volume servers, switches and storage that can be located anywhere in the network. One of the main challenges to implement NFV is the problem of allocating Virtual Network Functions (VNFs) on top of the physical network infrastructure. Up to now, existing...
In this paper, we make a case for using lightweight containers for fine-grained resource flexing for Virtualized Network Functions (VNFs) to meet the demands of varying workloads. We quantitatively compare the VNF performance and infrastructure resource usage of three instantiations (bare metal, virtual machine, and container) of three selected VNFs. The three VNFs we experiment with are the Mobility...
Virtualization technology is the foundation of Cloud services. To achieve the maximum hardware utilization, Cloud service providers usually host many guest VMs on one VM host. However, as the number of VM increases, the disk accessing performance drops significantly. Disk performance in multiple VM environment is one of the most significant problems in cloud environment. In this work, we propose a...
Currently, Software Defined Networking (SDN) paradigm has attracted a significant interest from industry and academia as a future network architecture. The programmable control plane enables flexible and rapid modifications of network behavior. With OpenFlow, one of the promising SDN protocols, we can provide several advantages to develop advanced network virtualization technologies. In this paper,...
The combination of emerging concepts, such as Fog Computing, Software Defined Networking and Network Function Virtualization will contribute to transform the network into a flexible and dynamical continuum of resources, on which services can be easily deployed and managed (network programmability). In this scenario, a major topic is the use of ad hoc h/w accelerators, in particular to provide the...
The paper describes on-going work on a configurable network based experimental platform ReSeLa. The platform is a key component of the ongoing EU funded TEMPUS project ENGENSEC. The project is aiming at providing courses and training material to educate future generation of Cyber security experts. Our project is based on the educational Framework; Conceive, Design, Implement, Operate (CDIO1). The...
Dedicated servers are deployed by companies to meet the ever growing computing demand. More storage and more security are sought after by companies. The inefficient scaling of hardware, higher deployment time, installation of old operating systems on new hardware are just some of the areas where dedicated servers suffer. Cloud severs can be used in lieu of dedicated servers. This will not only decrease...
The Third International Workshop on Dependability of Clouds, Data Centers, and Virtual Machine Technology (DCDV 2013) features papers covering various aspects of dependability and security in Clouds and Data Centers. Four sessions covering Cloud and Data Center Networking, Dependability Evaluation, Mobile and Cloud Computing, and Virtualization and Cloud include eleven papers.
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