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Network Function Virtualization (NFV) and Software-Defined Networking (SDN) are two paradigms that have attracted much attention in the networking field. The first permits the implementation of Network Functions (NFs) on commodity servers located in datacenters. The second facilitates the management and routing of network flows by controllers. While recent work has mostly explored the use of NFV and...
With software-defined network (SDN) and network function virtualization (NFV) techniques, we can embed the service chain consisting of a sequence of virtualized network functions (VNFs), i.e., we can determine the flow path and deploy the VNFs contained in the service chain at any place on the path. In the literature, the methods of service chain embedding bound the number of VNFs at a node, whereas...
Internet eXchange Points (IXPs) serve as landmarks where many network service providers meet to obtain reciprocal connectivity. Some of them, especially the largest, offer route servers as a convenient technology to simplify the setup of a high number of bi-lateral peerings. Due to their potential to support a quick and easy interconnection among the networks of multiple providers, IXPs are becoming...
Recently, there are significant advances in the areas of networking, caching and computing. Nevertheless, these three important areas have traditionally been addressed separately in the existing research. In this paper, we present a novel framework that integrates networking, caching and computing in a systematic way and enables dynamic orchestration of these three resources to improve the end-to-end...
Middleboxes or network appliances like firewalls, proxies, and WAN optimizers have become an integral part of today’s ISP and enterprise networks. Middlebox functionalities are usually deployed on expensive and proprietary hardware that require trained personnel for deployment and maintenance. Middleboxes contribute significantly to a network’s capital and operation costs. In addition, organizations...
Live Virtual machine (VM) migration is a promising solution for data center (DC) administrators to achieve a wide range of objectives - from load balancing to disaster evacuation. Ideally, live VM migration is seamless and the challenge is to minimize the downtime during which the VM is not responding to requests or providing the service. The duration of the downtime is mainly influenced by the migration...
Computer networks today typically do not provide any mechanisms to the users to learn, in a reliable manner, which paths have (and have not!) been taken by their packets. Rather, it seems inevitable that as soon as a packet leaves the network card, the user is forced to trust the network provider to forward the packets as expected or agreed upon. This can be undesirable, especially in the light of...
The traditional identifier locator split network has many issues such as inflexibility, hard to innovate and difficult to deploy. SDN (Software Defined Network) provides a new direction for designing flexible identifier locator split network. The recent identifier locator split network based on SDN use the OpenFlow swicth directly via rewritting the address, which lacks the scalability and utilizes...
SDI (Software Defined Infrastructure) provides virtualized infrastructures to customers by slicing computing resources and network resources. One of the important problems for deploying SDI framework is to control the assignment of physical resources to a virtual network against changes of traffic demand and service demand. For this problem, VNE (Virtual Network Embedding) problem that maps a virtual...
Link flooding attack (LFA), as a new type of DDoS attack, can degrade or even cut off network connectivity of a target area. This attack employs legitimate, low-density flows to flood a group of selected links. Therefore, these malicious flows can hardly be distinguished by traditional schemes. In this paper, we propose a scheme called Woodpecker, which makes the LFA more difficult to take effect...
The rapid development of cloud computing has raised big concerns over the high energy consumption of modern data centers. To satisfy the ever increasing data traffic needs, the energy consumption of data center network (DCN) also takes a significant proportion. The newly emerging technology, Software Defined Networking (SDN), which allows flexible control of network devices, brings a new opportunity...
Content-Centric Networking (CCN) is a promising architecture in the current Internet, and has the potential to be a revolutionary innovation in the future Network. CCN has not broken away from the binding of physical location and content name, however, the content source mobility will remain a great challenge for CCN. In addition, the problem of the large overhead incurred during the handoff requires...
Traditional workflow design tools which only provide the choreography of simple flow chart and do not provide a graphical configuration for access to a service, are unable to meet user demand for services. The article expands the Activiti Designer open source framework. It maintains communication through the bottom of the enterprise service bus, provides the registration services (OSGI, WebService,...
Software Defined Networking (SDN) is an emerging networking paradigm which intends to merge networks into the age of the cloud, providing fine-grained control, simplified configurations, unprecedented flexibility and seamless scalability. However, due to the large set of unresolved challenges as well as the deployment cost, network evolution to fully SDN systems will take a long time. In fact, SDN...
In this study, we aim to analyze how Software Defined Networking (SDN) can help to ensure a high-quality uninterrupted Voice over Internet Protocol (VoIP) service accompanied by video for prioritized users and entities in a network congested with background traffic. Guaranteeing a level of Quality of Service (QoS) and resource prioritization are key concepts for future networks (e.g., 5G, NGSON) and...
This paper proposes an Internet protocol (IP) state migration method for developing resource-portable IP routers that are not virtual-machine based but commercial based. Resource-portable IP routers have the potential for achieving a sustainable network by functioning as a shared backup router. While previous studies relied on a virtualized technology (e.g., a virtual machine-based router on commodity...
Network Function Virtualization (NFV) enables flex- ible deployment of middleboxes as Virtual Machines (VMs) running on general hardware. Different types of middleboxes have the potential to either increase or decrease the volume of processed traffic. In this paper, we investigate the traffic changing effects of middleboxes, and study efficient deployment of NFV middleboxes in Software-Defined Networks...
Information-centric networking has been proposed to achieve efficient and reliable distribution of content. We propose a model to assign content locators to content names. Information routing decision is made based on geometric routing using the assigned locators. We consider a geometric routing scheme known as geodesic geometric routing. We demonstrate on the iLab.t virtual wall the successful operation...
In this paper we propose how to design a modular, event-driven continuous integration server. Unlike many servers in use today, the proposed solution is designed to integrate seamlessly with other development tools and services. It is based on a special purpose communication platform that can be used to govern the development process itself.
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