Explosion of IP address configuration and management. • VM to Server is predicted to be a ration. • VMotion requires that the destination be on the same IP. PDF | This paper is a tutorial, which discusses reference model; architectural principles and objectives of network virtualization. Network. PDF | Network virtualization refers to a broad set of technologies. Commercial solutions have been offered by the industry for years, while more.
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Petr Grygarek, Advanced Computer Networks Technologies. 1. Network Virtualization. Petr Grygárek . dcb-pelissier-NIC-Virtualizationpdf. Network virtualization is a technology which enables combining computer network resources into a single platform appearing as a single network. In this form of. Foreword by Pat Gelsinger. VMware NSX®. Network. Virtualization. Fundamentals. Gustavo A. A. Santana, VCIX-NV® and CCIE®
NFV is a technology in which network functions that are conventionally implemented in dedicated hardware are implemented by software on general-purpose servers. Performance increases in general-purpose servers and technological advances in virtualization technologies have led to NFV with carrier-grade performance, scalability, and reliability.
The application of NFV to carrier networks is expected to enable high scalability and reliability at low cost, as well as rapid service deployment, flexible resource assignment according to the demand for each service, and service deployment without the EoL end of life restrictions of hardware-based equipment. Additionally, because many different network functions are aggregated in general-purpose servers, reductions in CAPEX capital expenditures and OPEX operating expenses , lower power consumption, and a reduced equipment footprint are also expected.
Participants from many major carriers and equipment vendors from all over the world are actively focusing on NFV and are pushing the work forward. SDN consists of technology to control and manage network equipment in a centralized fashion by means of software techniques. Applying SDN to carrier networks makes it possible to separate control and forwarding functions, which have been implemented in a single piece of equipment until now, and to aggregate control functions in a cloud.
Network architecture in virtualization era 3.
As in the past, future networks are expected to offer steady communication services as a vital social infrastructure. These include fixed consumer services such as Internet access and voice services, mobile services such as mobile voice and broadband services, and enterprise services such as virtual private networks and wide-area LAN local area network services.
Such future networks are also required to have the capability to offer new services rapidly and flexibly in order to meet diversified needs. Furthermore, these networks will have some mechanisms developers can use to create brand new services in cooperation with service providers.
From a carrier viewpoint, operating and managing a network that can become increasingly complicated and sophisticated is a critical issue. NFV and SDN are expected to be key technologies to build the future networks, which must meet various demands and needs.
Next, we outline the architecture of these future networks and describe the network virtualization technologies used in them. There are four key network virtualization technologies that compose the future networks, as follows Fig.
Structure of future networks. Network virtualization technology for future networks. For instance, a service provider can easily create its own network service by combining its own application with a logical network offered by the future networks.
We can use SDN technologies to build a logical network. Computing resources are deployed in a carrier cloud as general-purpose servers, whereas network resources are deployed as network equipment.
Integrated control technology consists of an orchestrator, which manages the assignment of resources throughout the network, and a network controller, which controls the network equipment. The orchestrator reassigns resources in response to variations in the demand for each service and resource requests from service providers. The network controller controls a forwarding network composed of general-purpose switches upon request from the orchestrator.
The interface and protocol specifications between a network controller and a piece of network equipment is referred to as a southbound API application programming interface.
OpenFlow is one of the most popular southbound API protocols. Additionally, work is proceeding to advance network operation using big data. For instance, the network controller manages a network based on big data analysis of traffic variations in order to improve QoE quality of experience at low cost.
It is a fundamental technology that enables various carrier network functions to be implemented as NFV. It is expected to achieve rapid and efficient development of services and improved tolerance for traffic variations. Furthermore, it can build a disaster-resistant network which, for instance, concentrates network resources on the most basic communication services—such as voice services—as a lifeline in the event of a large-scale disaster.
Extracting intelligent control and service functions from traditional routers and transport systems to be virtualized and implemented by a software application as a network controller enables network equipment to be specialized to provide a forwarding function. Carriers expect this trend to result in the commoditization of network equipment and low-cost procurement. Additionally, it can lead to a reduction in the amount of network equipment needed since SDN technology can integrate multiple network devices used for each layer into a single device.
We've also updated our Privacy Notice. Click here to see what's new. Network virtualization refers to a broad set of technologies. Commercial solutions have been offered by the industry for years, while more recently the academic community has emphasized virtualization as an enabler for network architecture research, deployment, and experimentation. We review the entire spectrum of relevant approaches with the goal of identifying the underlying commonalities.
We also discuss a set of challenges and research directions that we expect to come to the forefront as network virtualization technologies proliferate.
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Cited by links are available to subscribers only. Login or Create Account. Allow All Cookies. Journal of Lightwave Technology Vol. Rouskas, and Ilia Baldine, "Network Virtualization: Technologies, Perspectives, and Frontiers," J. Lightwave Technol. Related Topics.