Recently, the SDN is a popular research field. The centralized controller can control all network devices. In addition, the priority if the packet transmitting route of the network or the supervision of the network sa...
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network function virtualization promises to reduce the cost to deploy and to operate large networks by migrating var- ious networkfunctions from dedicated hardware appliances to software instances running on general ...
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network function virtualization (NFV) enables flexible deployment of middleboxes as Virtual Machines (VMs) running on general hardware. Different types of middleboxes have the potential to either increase or decrease ...
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ISBN:
(纸本)9781479959532
network function virtualization (NFV) enables flexible 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 (SDNs). To begin with, we formulate the Traffic-Aware Middlebox Placement (TAMP) problem as a graph optimization problem, and show that it is NP-hard when there are multiple flows to consider. Next, by observing that in reality flows arrive one at a time, we leverage the SDN central control mechanism, and propose an optimal solution for the TAMP problem with a single flow. We develop the solution in two steps. First, when the flow path has been determined, we present the Least-First-Greatest-Last (LFGL) rule to place middleboxes. Second, we integrate the LFGL rule with widest-path routing to propose the LFGL based MinMax routing algorithm. Further, we have implemented the proposed algorithm as a module running on top of the Floodlight SDN controller, and conducted experiments in the Mininet emulation system. The experiment results fully demonstrate the superiority of our algorithm over other benchmark solutions.
This paper presents a creative lightweight solution to package any existing VNF (Virtualized networkfunction) to support ETSI NFV (network function virtualization) architecture quickly and easily. The preconditions o...
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Space-ground integrative information network is an effective method to realize the global coverage of information, and the efficient use of information and communication resources. In the face of the current situation...
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ISBN:
(纸本)9781467376884
Space-ground integrative information network is an effective method to realize the global coverage of information, and the efficient use of information and communication resources. In the face of the current situation of the space information network considered for specific and military purposes, as well as the characteristics of the closed and rigid, it becomes an urgent problem that how to realize the information service of space-ground integrative and military-civilian integrative. This paper presents OpenFlow based spatial information network architecture. Firstly, the basic framework of Space-ground integrative network is introduced in detail. Secondly, the key technologies such as spatial physical resource management strategy, virtual spatial network management strategy and virtual spatial network slice management strategy, spatial application management strategy are designed in detail. This structure can realize the flexible control of the space information network, the integration of the fusion, the open programmable and the flexibility of the space information network.
networkfunctions virtualization (NFV) is an emerging initiative to overcome increasing operational and capital costs faced by network operators due to the need to physically locate networkfunctions in specific hardw...
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ISBN:
(纸本)9781479959532
networkfunctions virtualization (NFV) is an emerging initiative to overcome increasing operational and capital costs faced by network operators due to the need to physically locate networkfunctions in specific hardware appliances. In NFV, standard IT virtualization evolves to consolidate networkfunctions onto high volume servers, switches and storage that can be located anywhere in the network. Services are built by chaining a set of Virtual networkfunctions (VNFs) deployed on commodity hardware. The implementation of NFV leads to the challenge: How several network services (VNF chains) are optimally orchestrated and allocated on the substrate network infrastructure? In this paper, we address this problem and propose CoordVNF, a heuristic method to coordinate the composition of VNF chains and their embedding into the substrate network. CoordVNF aims to minimize bandwidth utilization while computing results within reasonable runtime.
As service chaining matures, interoperability is a must. network service headers provide the required data-plane information needed to construct topologically independent service paths as well as to pass opaque metada...
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As service chaining matures, interoperability is a must. network service headers provide the required data-plane information needed to construct topologically independent service paths as well as to pass opaque metadata between classification and service functions.
As cloud computing's second wave begins to transform the networking industry, a snapshot of developments in software-defined networking standardization suggests how its components-devices, controllers, application...
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As cloud computing's second wave begins to transform the networking industry, a snapshot of developments in software-defined networking standardization suggests how its components-devices, controllers, applications, service chains, network function virtualization, and interfaces-are maturing.
NTT network Service Systems Laboratories has been applying networkvirtualization technologies such as NFV (networkfunctions virtualisation) and SDN (software-defined networking) as part of efforts to develop the arc...
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NTT network Service Systems Laboratories has been applying networkvirtualization technologies such as NFV (networkfunctions virtualisation) and SDN (software-defined networking) as part of efforts to develop the architecture of future networks that are efficient, flexible, and intelligent. This article gives an overview of these efforts.
Many networkfunctions such as firewalls and intrusion detection systems have been implemented on specifically designed hardware. Today we are seeing a technological trend in which these functions are being implemente...
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Many networkfunctions such as firewalls and intrusion detection systems have been implemented on specifically designed hardware. Today we are seeing a technological trend in which these functions are being implemented as software running on general purpose servers. The European Telecommunications Standards Institute has established an Industry Specification Group (ISG) to discuss and define the requirements for networkfunctions Virtualisation (NFV). This article introduces the concept of NFV and summarizes the activities of the NFV ISG.
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