Virtualization is one of the biggest buzzwords of the technology industry right at this moment. The fast growth in storage capacity and processing power in enterprise installations coupled with the need for high availability, requires Storage Area Network (SAN) architecture to provide seamless addition of storage and performance elements without downtime. The usual goal of virtualization is to ...

Virtualization was invented more than thirty years ago to allow large expensive mainframes to be easily shared among different application environments. As hardware prices went down, the need for virtualization faded away. More recently, virtualization at all levels (system, storage, and network) became important again as a way to improve system security, reliability and availability, reduce co...

Virtualization has been extended from wired to wireless networks. It improves efficiency and utilization and enables customized service and multi-tenancy. New architectures involving virtualization have been proposed in the major wireless domains such as WiFi, cellular network and wireless application in Internet of things (IoT). Additionally, the use of Software Defined Radio (SDR) gives more ...

In this paper we present Stateless Network Functions, a new architecture for network functions virtualization, where we decouple the existing design of network functions into a stateless processing component along with a data store layer. In breaking the tight coupling, we enable a more elastic and resilient network function infrastructure. Our StatelessNF processing instances are architected a...

The energy consumption of IT and communication infrastructure is dramatically increasing. In the year 2000 the power consumption of servers, routers, and PCs in Germany was about 5 billion kWh per year [1]. For the year 2010 a power consumption of more than 55 billion kWh per year is expected for the IT and communication infrastructure in Germany [2]. In the face of global warming the reversal ...

Diagnosing problems, deploying new services, testing protocol interactions, or validating network configurations are hard problems in today’s Internet. This paper proposes to leverage the concept of Network Virtualization to overcome such problems: (1) Monitoring VNets can be created on demand along side any production network to enable network-wide monitoring in a robust and cost-efficient man...

This paper reports on improvements to Xen’s networking performance resulting from the re-design and the re-implementation of certain aspects of its network virtualization and better support for advanced, hardware memory management features. Our design remains compatible with the basic Xen 2.0 architecture of locating device drivers in a privileged driver domain that has direct access to the dev...

In this manuscript, the cloud computing and its security issues have been demonstrated in case of Network virtualization process. Cloud computing is the delivery of computing as a service rather than a product, whereby shared resources, software, and information are provided to computers and other devices as a utility (like the electricity grid) over a network (typically the Internet). Cloud co...

Network virtualization realizes the vision of an Internet where resources offered by different stakeholders are used and shared by multiple coexisting virtual networks. The abstraction introduced by network virtualization opens new business opportunities. We expect that in the near future, infrastructure providers (or resource brokers and resellers) will offer flexibly specifiable and on-demand...

Two complementary architectures, software defined networking (SDN) and network function virtualization (NFV) are emerging to comprehensively address several networking issues. In this work, we introduce the most embraced virtualization concepts proposed by SDN and NFV architectures. We quantitatively evaluate hardware and energy cost savings with these two SDN and NFV architectures compared to ...