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检索条件"主题词=Network Function Virtualization"

共 3142 条记录，以下是61-70 订阅

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Hierarchical Multi-resource Fair Queueing for network function virtualization

Hierarchical Multi-resource Fair Queueing for Network Functi...

引用

IEEE Conference on Computer Communications (IEEE INFOCOM)

作者： You, Chaoqun Univ Elect Sci & Technol China Chengdu Sichuan Peoples R China

ISBN: (纸本)9781728105154

As the volume of traffic flows surges, providing Quality-of-Service (QoS) guarantees to flows by fair queueing has never been more challenging in network function virtualization (NFV). There has been a recent effort in both industry and academia to develop fair queueing algorithms across multiple resources in NFV. However, all existing works fail to support hierarchical scheduling, a crucial feature that also provides QoS guarantees to grouped flows on tenant boundaries. In this paper, we present two new multi-resource fair queueing algorithms that support hierarchies, collapsed Hierarchical Dominant Resource Fair Queueing (collapsed II-DRFQ) and dove-tailing H-DRFQ, both of which provide hierarchical share guarantees. Through formal analysis, we find that the dove-tailing H-DRFQ outperforms collapsed H-DRFQ by providing a smaller delay bound. However, according to the simulation results, both algorithms have their pros and cons. Dove-tailing II-DRFQ benefits to the flows with more complex hierarchies, while collapsed II-DRFQ is better for the flows with simpler attribution structures. Meanwhile, our simulation shows that both H-DRFQ algorithms can achieve near perfect fairness.

关键词： Scheduling Quality of service Middleboxes network function virtualization Delays Bandwidth Surges

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Inferring Firewall Rules by Cache Side-channel Analysis in network function virtualization 38

Inferring Firewall Rules by Cache Side-channel Analysis in N...

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39th IEEE International Conference on Computer Communications (IEEE INFOCOM)

作者： Shin, Youngjoo Koo, Dongyoung Hur, Junbeom Kwangwoon Univ Sch Comp & Informat Engn Seoul South Korea Hansung Univ Dept Elect & Informat Engn Seoul South Korea Korea Univ Dept Comp Sci & Engn Seoul South Korea

ISBN: (纸本)9781728164120

network function virtualization takes advantage of virtualization technology to achieve flexibility in network service provisioning. However, it comes at the cost of security risks caused by cache side-channel attacks on virtual machines. In this study, we investigate the security impact of these attacks on virtualized network functions. In particular, we propose a novel cache-based reconnaissance technique against virtualized Linux-based firewalls. The proposed technique has significant advantages in the perspective of attackers. First, it enhances evasiveness against intrusion detection owing to the ability of source spoofing. Second, it allows inference on a wide variety of filtering rules. During experiment in VyOS, the proposed method could infer the firewall rules with an accuracy of more than 90% by using only a few dozen packets. We also present countermeasures to mitigate cache-based attacks on virtualized network functions.

关键词： network function virtualization Cache side-channel analysis Firewall reconnaissance

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Service Forwarding Label for network function virtualization and Application-centric Traffic Steering 6

Service Forwarding Label for Network Function Virtualization...

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12th International Joint Conference on E-Business and Telecommunications (ICETE)

作者： Huang, Changcheng Zhu, Jiafeng Carleyton Univ Dept Syst & Comp Engn Ottawa ON Canada Huawei Technol Inc R&D Ctr Santa Clara CA USA

ISBN: (纸本)9789897581403

New services such as network virtualization, service chaining, and application-centric traffic steering bring new opportunities for network providers and service providers. Existing Internet architecture is suffering from the so-called ossification problem, which makes it difficult to support new applications. Software Defined network (SDN) is becoming a new paradigm for both WAN and enterprise networks. By separating control and data planes, SDN allows network providers to sell new services without changing their physical switches. While SDN is poised to support new services, it is still in development stage. Mechanisms supporting new services are still missing. In this paper, we propose a new application driven mechanism called Service Forwarding Label (SFL) which can be used as a uniform label to differentiate various services and forward packets based on different service requirements. Compared with existing solutions such as VXLAN, our SFL approach introduces less overhead and supports more new services.

关键词： Software Defined network network function virtualization Traffic Steering Service Chaining VXLAN

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Branching-Aware Service function Placement and Routing in network function virtualization

Branching-Aware Service Function Placement and Routing in Ne...

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IEEE Conference on network function virtualization and Software Defined networks (NFV-SDN)

作者： Jalalitabar, Maryam Wang, Yang Cao, Xiaojun Boston Coll Dept Comp Sci Chestnut Hill MA 02167 USA La Salle Univ Dept Math & Comp Sci Philadelphia PA 19141 USA Georgia State Univ Dept Comp Sci Atlanta GA 30303 USA

ISBN: (纸本)9781728145457

network function virtualization (NFV) is an emerging technology that promises to address issues in traditional middleboxes, providing service flexibility and reduced cost. NFV decouples network functions from the proprietary middlebox hardware, thus allowing the network providers to implement network functions on virtual machines running in standard servers. To deliver an end-to-end service in the NFV environment, Service function Chain (SFC) is used to define the sequence of actions or Virtual network functions (VNFs) that needs to be applied to the data stream of a service delivery demand. Typically, the SFC is regarded as a linear topology that consists of a group of VNFs that the data stream is navigated through. However, our recent exploration on a group of real-life use cases reveals that the data stream can branch out to multiple data streams at certain VNFs (e.g., a load balancer). This branching indicates that the packet flow may be directed to multiple different paths, resulting in a more complex mesh-like service function graph. In this paper, we define the resulting problem as Branching-Aware Service function Graph embedding and routing (B_SFG). We study how to efficiently accommodate user's B_SFG requests in the physical network while considering the constraints of function dependency, branching requirements, computing resources of virtual nodes and bandwidth demand of the virtual links. We propose a novel algorithm, B_SFG_CM, which jointly optimizes the processes of node and link mapping of a request. B_SFG_CM employs the proposed techniques of dependency sorting and layering that effectively take into account the node dependency, branching points and the resource status of the physical network. Our experimental results show that the proposed algorithm significantly outperforms the scheme based on the traditional sequential node/link embedding in which the node and link mapping is done sequentially.

关键词： network function virtualization

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Reconfigurable network Slicing Orchestration in network function virtualization Compatible Operational Technology Environment

Reconfigurable Network Slicing Orchestration in Network Func...

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2024 International Conference on Communications Control and Computing Technologies for Smart Grids

作者： Delgado, Brian G. Kodiles Aguayo, Jared M. Rivera, Abel O. Gomez Tosh, Deepak K. Univ Texas El Paso Dept Comp Sci El Paso TX 79968 USA Johns Hopkins Univ Appl Phys Lab Laurel MD USA Sandia Natl Labs Albuquerque NM USA

ISBN: (纸本)9798350318562;9798350318555

The ongoing transition to Industry 4.0, which is characterized by increased inter-connectivity of cyber-physical systems, requires having time-sensitive, high throughput, and secure transfer of critical data in industrial sites. In this context, network slicing emerges as a critical tool to ensure timely data delivery by provisioning the network resources to cater to specific applications' requirements and mitigating potential cyber attacks. To address these challenges, this paper aims to tackle two key questions essential for the successful implementation of network slicing in industrial environments. First, it investigates architectural considerations for developing a network infrastructure capable of supporting network slicing functionalities effectively. The proposed approach significantly improves deployment efficiency over traditional manual configurations. Second, it delves into the automated orchestration process, elucidating the steps and components involved in transitioning from a static network management approach to dynamically leverage network function virtualization schemes for creating network slices in ad-hoc manner. The system demonstrates high throughput suitable for production-level solutions and maintains exceptionally low latency, making it ideal for ultra-reliable low-latency communications. Even with increased network demands, the system remains stable, with effective Quality of Service (QoS) management, ensuring reliable performance under varying conditions. The proposed architecture outlines the necessary components, services, and communication protocols required for a production-level orchestrator for network segmentation in SCADA environments.

关键词： Cyber-Physical Systems network function virtualization Operational Technology Software-Defined network

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A Scalable and Flexible DDoS Mitigation System Using network function virtualization

A Scalable and Flexible DDoS Mitigation System Using Network...

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IEEE/IFIP network Operations and Management Symposium (NOMS)

作者： Rashidi, Bahman Fung, Carol Rahman, Mohammad Virginia Commonwealth Univ Dept Comp Sci Richmond VA 23284 USA Tennessee Technol Univ Dept Comp Sci Cookeville TN USA

ISBN: (纸本)9781538634165

Distributed Denial of Service (DDoS) attacks remain one of the top threats to enterprise networks and ISPs nowadays. It can cause tremendous damage by bringing down online websites or services. Existing DDoS defense solutions either brings high cost such as upgrading existing firewall or IPS, or bring excessive traffic delay by using third-party cloud-based DDoS filtering services. In this work, we propose a DDoS defense framework that utilizes network function virtualization (NFV) architecture to provide low cost and highly flexible solutions for enterprises. In particular, the system uses virtual network agents to perform attack traffic filtering before they are forwarded to the target server. Agents are created on demand to verify the authenticity of the source of packets, and drop spoofed packets in order protect the target server. Furthermore, we design a scalable and flexible dispatcher to forward packets to corresponding agents for processing. A bucket-based forwarding mechanism is used to improve the scalability of the dispatcher through batching forwarding. The dispatcher can also adapt to agent addition and removal. Our simulation results demonstrate that the dispatcher can effectively serve a large volume of traffic with low dropping rate. The system can successfully mitigate SYN flood attack by introducing minimal performance degradation to legitimate traffic.

关键词： Distributed Denial of Service network function virtualization DDoS mitigation Scalable routing

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A Design of Virtual Machine aware Flow Switch in the Cloud based network function virtualization System 19

A Design of Virtual Machine aware Flow Switch in the Cloud b...

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19th International Conference on Advanced Communication Technology (ICACT)

作者： Choi, Kang Il Lee, Bhum Cheol ETRI Network Res Div Daejeon South Korea

ISBN: (纸本)9788996865094

In this paper, we present a design of Virtual Machine aware flow switch in the Cloud based network function virtualization System, which capable of providing a service at a stable speed even though the number of virtual machines connected to a hypervisor is increased by extracting flow information about each of a plurality of packets and providing network virtualization. In this paper, we also present an architecture of the VM aware flow switch, detailed operation method of it, and the POC of the VM aware flow switch.

关键词： Flow Switch Cloud network function virtualization

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A Study of Slice-Aware Service Assurance for network function virtualization 5

A Study of Slice-Aware Service Assurance for Network Functio...

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5th IEEE Conference on network Softwarization (IEEE NetSoft) / 2nd International Workshop on Advances in Slicing for Softwarized Infrastructures (S4SI)

作者： Kim, Juhoon Xie, Min Deutsch Telekom AG Bonn Germany Telenor Telenor Res Fornebu Norway

ISBN: (纸本)9781538693766

In an NFV environment, a single physical infrastructure commonly operates multiple virtual networks (i.e., network slicing) which makes the resource management and service assurance complicated. The network slice is expected to be customer-oriented and meet the Quality of Experience (QoE) requirements as well as conventional Quality of Service (QoS) requirements. However, unified and QoE-aware service assurance is largely uncharted in the management and orchestration architecture of NFV systems. To address this problem, we introduce a novel framework for assuring the sliced services running in a network function virtualization (NFV) environment and discuss the core functions of the framework. Our Service Assurance (SA) framework extends the ETSI MANO architecture. Based on a hierarchical architecture, the framework collates information collected from different layers contributing to the provision of a service within a shared physical infrastructure. Moreover, it allows the creation of a mapping from the underlying infrastructure performance to the QoE such that NFV management and operation can be adapted to assure both QoS and QoE. A set of measurement results are provided to illustrate the significance of such a mapping.

关键词： network slicing Quality of experience Monitoring Computer architecture Quality of service network function virtualization Resource management Quality of service management of resources Computer Architecture Nelfinavir MAPPING(MATHEMATICAL) Frameworks INFRASTRUCTURE

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Data Rate Guarantee for Coflow Scheduling in network function virtualization 24

Data Rate Guarantee for Coflow Scheduling in Network Functio...

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24th IEEE/ACM International Symposium on Quality of Service (IWQoS)

作者： Zhang, Jianhui Li, Keqiu Guo, Deke Qi, Heng Tao, Xiaoyi Jin, Yingwei Dalian Univ Technol Sch Comp Sci & Technol Dalian Peoples R China Natl Univ Def Technol Sch Informat Syst & Management Changsha Hunan Peoples R China Dalian Univ Technol Sch Management Dalian Peoples R China

ISBN: (纸本)9781509026340

In data centers, a lot of cluster computing applications follow a coflow pattern. On the other hand, network function virtualization (NFV) sufficiently improves the performance of the data center network. However, coflows encounter extremely different processing delays under diverse network functions. Traditional coflow scheduling schemes become insufficient in this situation. Based on the observation that the benefit of coflows is closely related to the data rates of flows, we propose DRGC (Data Rate Guarantee for Coflow) to guarantee the data rate requirements of coflows in the NFV environment. We prioritize the scheduling sequence of coflows, precisely allocate data rates for individual flows, and design an efficient scheduling algorithm. DRGC maintains the desired data rates of coflows with higher priorities at middleboxes and leaves more scheduling opportunities to the ones with lower priorities. In the large-scale trace-driven experiment, DRGC efficiently guarantees the data rate requirements of coflows and supports more 15% workload, compared with other scheduling schemes.

关键词： network function virtualization

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Optimization of Migration Cost for network function virtualization Replacement 21

Optimization of Migration Cost for Network Function Virtuali...

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21st International Arab Conference on Information Technology (ACIT)

作者： Shoura, Fadia Gharaibeh, Ammar Alouneh, Sahel German Jordanian Univ Dept Comp Engn Amman Jordan Al Ain Univ Coll Engn Abu Dhabi U Arab Emirates

ISBN: (纸本)9781728188553

Today's networks are concerned about making the control of communication flexible and improving the existing management systems in such a manner that reduces the Capital expenditures (CAPEX) and operating expenses (OPEX), through reducing equipment costs and energy efficiency. Along with the benefits of decreasing the time to promote new services to the clients, service providers' attention has gradually moved to network function virtualization (NFV), which is a potential technology decoupling network functionalities from hardware and is a promise of high performance service provision with optimizing resource utilization across various infrastructures. However, to simultaneously achieve these goals, sometimes it is necessary to instantiate a new function depending on the traffic pattern of high-bandwidth characteristics and Quality of Service (QoS) measures. Due to the limited resources at the node, other functions in the node may need to be migrated to other nodes in order to provide resources for the new functions. Existing works related to the Virtual network function (VNF) deployment and migration usually focus on proposing new deployment strategies and migration mechanisms. However, reducing migration cost restricted to memory, CPU, and bandwidth capacities is not considered in those studies. In this work, the problem of virtual network functions migration is formulated as an Integer Linear Program (ILP) with the objective of minimizing the migration cost while satisfying computing and network resource capacities constraints and selecting the minimum cost path from the source to the destination node. Since the ILP is NP-complete, we propose a greedy minimum migration cost (GMMC) algorithm. Simulation results show that the proposed GMMC algorithm can reduce the total migration cost by up to 61% and the number of migrations by up to 52% when compared to the state-of-the-art schemes.

关键词： Integer Linear Programming Migration Cost network function virtualization Optimization

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