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检索条件"主题词=Network Function Virtualization"

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Virtual network functions Orchestration in Wireless networks 11

Virtual Network Functions Orchestration in Wireless Networks

引用

11th International Conference on network and Service Management (CNSM)

作者： Riggio, Roberto Bradai, Abbas Rasheed, Tinku Schulz-Zander, Julius Kuklinski, Slawomir Ahmed, Toufik CREATE NET Trento Italy Univ Poitiers XLIM Inst Poitiers France TU Berlin Berlin Germany Orange Polska Warsaw Poland Univ Bordeaux CNRS LaBRI Bordeaux France

ISBN: (纸本)9783901882777

network function virtualization (NFV) is emerging as one of the most innovative concepts in the networking landscape. By migrating network functions from dedicated middleboxes to general purpose computing platforms, NFV can effectively reduce the cost to deploy and to operate large networks. However, in order to achieve its full potential, NFV needs to encompass also the radio access network allowing Mobile Virtual network Operators to deploy custom resource allocation solutions within their virtual radio nodes. Such requirement raises several challenges in terms of performance isolation and resource provisioning. In this work we formalize the Virtual network function (VNF) placement problem for radio access networks as an integer linear programming problem and we propose a VNF placement heuristic. Moreover, we also present a proof-of-concept implementation of an NFV management and orchestration framework for Enterprise WLANs. The proposed architecture builds upon a programmable network fabric where pure forwarding nodes are mixed with radio and packet processing nodes leveraging on general computing platforms.

关键词： network function virtualization

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Scalable Architecture for Service function Chain Orchestration 4

Scalable Architecture for Service Function Chain Orchestrati...

引用

Fourth European Workshop on Software Defined networks - EWSDN 2015

作者： Sahhaf, Sahel Tavernier, Wouter Czentye, Janos Sonkoly, Balazs Skoldstrom, Pontus Jocha, David Garay, Jokin UGent iMinds Ghent Belgium BME Budapest Hungary Acreo Budapest Hungary ETH Zurich Switzerland Univ Basque Country Leioa Spain

ISBN: (纸本)9781509001804

network function virtualization (NFV) enables to implement network functions in software, high-speed packet processing functions which traditionally are dominated by hardware implementations. Virtualized network functions (NFs) may be deployed on generic-purpose servers, e.g., in datacenters. The latter enables flexibility and scalability which previously were only possible for web services deployed on cloud platforms. The merit of NFV is challenged by control challenges related to the selection of NF implementations, discovery and reservation of sufficient network and server resources, and interconnecting both in a way which fulfills SLAs related to reliability and scalability. This paper details the role of a scalable orchestrator in charge of finding and reserving adequate resources. The latter will steer network and cloud control and management platforms to actually reserve and deploy requested services. We highlight the role of involved interfaces, propose elements of algorithmic components, and will identify major blocks in orchestration time in a proof of concept prototype which accounts for most functional parts in the considered architecture. Based on these evaluations, we propose several architectural enhancements in order to implement a highly scalable network orchestrator for carrier and cloud networks.

关键词： network function virtualization

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Towards High Performance Packet Processing for 5G

Towards High Performance Packet Processing for 5G

引用

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

作者： Pinczel, Balazs Gehberger, Daniel Turanyi, Zoltan Formanek, Bence Ericsson Res Budapest Hungary

ISBN: (纸本)9781467368841

network functions virtualization aims to implement networking functions in the cloud - even the ones working on the user plane. This is envisioned by decomposing today's monolithic devices into smaller functions and re-composing them real-time. This enables flexibility and independent innovation, but may come at a performance price. In this paper we investigate the performance aspects of composing user plane functions. We have developed a prototype for mobile service chaining to experiment with the function call based composition method provided by the Click modular router. The prototype allows flexible management of feature sets, including the support for relocating user chains using context transfer. We provide a thorough performance evaluation, draw conclusions and propose a versatile execution environment, which combines various composition and processing methods in order to achieve high performance packet processing for 5G networks.

关键词： network function virtualization

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SnabbSwitch user space virtual switch benchmark and performance optimization for NFV

SnabbSwitch user space virtual switch benchmark and performa...

引用

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

作者： Paolino, Michele Nikolaev, Nikolay Fanguede, Jeremy Raho, Daniel Virtual Open Syst Grenoble France

ISBN: (纸本)9781467368841

New paradigms in networking industry, such as Software Defined networking (SDN) and network functions virtualization (NFV), require the hypervisors to enable the execution of Virtual network functions in virtual machines (VMs). In this context, the virtual switch function is critical to achieve carrier grade performance, hardware independence, advanced features and programmability. SnabbSwitch is a virtual switch designed to run in user space with carrier grade performance targets, based on an efficient architecture which has driven the development of vhost-user (now also adopted by OVS-DPDK, the user space implementation of OVS based on Intel DPDK), easy to deploy and to program through its Lua scripting layer. This paper presents the SnabbSwitch virtual switch implementation along with its novelties (the vhost-user implementation and the usage of a trace compiler) and code optimizations, which have been merged in the mainline project repository. Extensive benchmarking activities, whose results are included in this paper, have been carried on to compare SnabbSwitch with other virtual switching solutions (i.e., OVS, OVS-DPDK, Linux Bridge, VFIO and SR-IOV). These results show that SnabbSwitch performs as well as hardware based solutions, such as SR-IOV and VFIO, while allowing for additional functional and flexible operation;they show also that SnabbSwitch is faster than the vhost-user based version (user space) of OVS-DPDK.

关键词： network function virtualization

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VNF Service Chaining on SAVI SDI 1

引用

1st EAI International Conference on Future Access Enablers of Ubiquitous and Intelligent Infrastructures (FABULOUS)

作者： Yasrebi, Pouya Bemby, Spandan Bannazadeh, Hadi Leon-Garcia, Alberto Univ Toronto St George Campus40 St George St Toronto ON M5S 2E4 Canada

ISBN: (数字)9783319270722

ISBN: (纸本)9783319270722

Managing computational resources and networking elements over today's heterogeneous infrastructure has become very challenging. A need for virtualizing network functions has emerged to reduce infrastructure operating costs. In this paper we consider using software-defined infrastructure (SDI) resource management system (RMS) to achieve service chaining of virtualized network functions (VNFs). SDI allows for the integrated control and management of heterogenous resources. In an SDI environment, the end user has access to interfaces that allow programmatic management of the resources. The user can define their own service graph (SG), which determines the path that traffic must take through various VNFs. The ability to dynamically realize the SG is what is referred to by service chaining. Use cases of service chaining include adding a firewall in front of web server and multicasting. Furthermore, we tested the firewall use case in two scenarios to verify validity of our service chaining implementation.

关键词： Software defined infrastructure network function virtualization Virtualized network function Software defined networking OpenFlow Smart application on virtual infrastructure

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Implementing Dynamic Chaining of Virtual network functions in OpenStack Platform 17

Implementing Dynamic Chaining of Virtual Network Functions i...

引用

17th International Conference on Transparent Optical networks (ICTON 2015)

作者： Callegati, Franco Cerroni, Walter Contoli, Chiara Santandrea, Giuliano Univ Bologna DEI Via Venezia 52 I-47521 Cesena FC Italy

ISBN: (纸本)9781467378802

network function virtualization (NFV) is gaining a lot of interest as a flexible and cost-effective solution for replacing hardware-based, vendor-dependent middle-boxes with software-based appliances running in a cloud-like network environment. The NFV paradigm is then fundamental to bring the required programmatic capabilities to 5G transport networks. This paper discusses the practical issues of implementing dynamic chaining of virtual network functions running as virtual machines in the industry-standard OpenStack cloud platform. In particular, the focus is on the complexity of the underlying virtual network infrastructure and the design principles of a suitable SDN controller.

关键词： network function virtualization

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Toward Latency-Aware Dynamic Middlebox Scheduling 24

Toward Latency-Aware Dynamic Middlebox Scheduling

引用

International Conference on Computer Communications and networks ICCCN

作者： Duan, Pengfei Li, Qing Jiang, Yong Xia, Shu-Tao Tsinghua Univ Grad Sch Shenzhen Shenzhen 518055 Peoples R China Tsinghua Univ Dept Comp Sci & Technol Tsinghua Natl Lab Informat Sci & Technol Beijing 100084 Peoples R China

ISBN: (纸本)9781479999644

Under the current Internet environment, middlebox management has become a significant challenge for network operators. Schemes in prior works tried to simplify it with Software-Defined networking (SDN) technologies, and they provided reliable and flexible approaches to configure the middlebox-related flow entries. However, these schemes are inefficient in resource utilization with the dynamically changing traffic requirements, as they mainly focus on stationary hardware middleboxes. Furthermore, latencies of packets lack controls under these schemes. In this paper, inspired by network function virtualization (NFV), we employ software middleboxes, and build a processing delay model to formulate latency behaviours. And based on this model, we present a latency-aware NFV/SDN scheme called Quokka with portable software-based middleboxes that can be dynamically scheduled (placed) according to the changing traffic. Quokka controls the number of middleboxes by efficient and automatic scheduling of both traffic and middlebox positions, and thus reduces the transmission latencies of the network. Comprehensive experiments show: 1) compared with traditional configuration methods, Quokka reduces the transmission delay by about 20% on average;2) Quokka requires 30% to 50% less middleboxes than traditional schemes to achieve the same performance.

关键词： Software-Defined network network function virtualization Middlebox

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Virtual function Placement and Traffic Steering in Flexible and Dynamic Software Defined networks 21

Virtual Function Placement and Traffic Steering in Flexible ...

引用

21st IEEE International Workshop on Local and Metropolitan Area networks (LANMAN)

作者： Mohammadkhan, Ali Ghapani, Sheida Liu, Guyue Zhang, Wei Ramakrishnan, K. K. Wood, Timothy Univ Calif Riverside Riverside CA 92521 USA George Washington Univ Washington DC 20052 USA

ISBN: (纸本)9781467367622;9781467367615

The integration of network function virtualization (NFV) and software defined networks (SDN) seeks to create a more flexible and dynamic software-based network environment. The line between entities involved in forwarding and those involved in more complex middle box functionality in the network is blurred by the use of high-performance virtualized platforms capable of performing these functions. A key problem is how and where network functions should be placed in the network and how traffic is routed through them. An efficient placement and appropriate routing increases system capacity while also minimizing the delay seen by flows. In this paper, we formulate the problem of network function placement and routing as a mixed integer linear programming problem. This formulation not only determines the placement of services and routing of the flows, but also seeks to minimize the resource utilization. We develop heuristicsto solve the problem incrementally, allowing us to support a large number of flows and to solve the problem for incoming flows without impacting existing flows.

关键词： Integer linear programming middlebox placement network function virtualization software defined networks

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Traffic-Aware Placement of NFV Middleboxes 58

Traffic-Aware Placement of NFV Middleboxes

引用

IEEE Global Telecommunications Conference (GLOBECOM)

作者： Ma, Wenrui Medina, Carlos Pan, Deng Florida Int Univ Sch Comp & Informat Sci Miami FL 33199 USA

ISBN: (纸本)9781479959525

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.

关键词： network function virtualization Software-Defined networking Traffic-Aware Routing

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VNGuard: An NFV/SDN Combination Framework for Provisioning and Managing Virtual Firewalls

VNGuard: An NFV/SDN Combination Framework for Provisioning a...

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

作者： Deng, Juan Hu, Hongxin Li, Hongda Pan, Zhizhong Wang, Kuang-Ching Ahn, Gail-Joon Bi, Jun Park, Younghee Clemson Univ Clemson SC 29631 USA Arizona State Univ Tempe AZ 85287 USA Tsinghua Univ Beijing Peoples R China San Jose State Univ San Jose CA 95192 USA

ISBN: (纸本)9781467368841

network function virtualization (NFV) together with cloud technology enables users to request creating flexible virtual networks (VNs). Users also have specific security requirements to protect their VNs. Especially, due to changeable network perimeters, constant VM migrations, and usercentric security needs, VNs require new security features that traditional firewalls fail to provide, because traditional firewalls rely greatly on restricted network topology and entry points to provide effective security protection. To address this challenge, we propose VNGuard, a framework for effective provision and management of virtual firewalls to safeguard VNs, leveraging features provided by NFV and Software Defined networking (SDN). VNGuard defines a high-level firewall policy language, finds optimal virtual firewall placement, and adapts virtual firewalls to VN changes. To demonstrate the feasibility of our approach, we have implemented core components of VNGuard on top of ClickOS. Our experimental results demonstrate the effectiveness and efficiency of virtual firewalls built on VNGuard.

关键词： network function virtualization

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