Generalizing Virtual Network Topologies in OpenFlow-Based Networks

Salvadori, Elio; Doriguzzi-Corin, Roberto; Broglio, Attilio; Gerola, Matteo

doi:10.1109/glocom.2011.6134525

Cited by 65 publications

(37 citation statements)

References 6 publications

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“…When virtual network requests arrive, the requested vswitches are sorted in descending order, which is similar to physical network nodes (lines 3-4). And then, the largest weight of virtual switch of virtual network request will be mapped to the largest weight nodes of physical network (lines [5][6][7][8][9][10][11][12][13][14]. All the virtual nodes, which are included in VNR, will try to be mapped.…”

Section: Survivable Virtual Network Embedding Algorithmmentioning

confidence: 99%

“…E. Salvadori et al [11] described an approach to embed virtual topologies based on OpenFlow by overcoming the problem that was strictly tied with the underlying physical topology, and links and nodes must match the substrate network configuration. Papagianni etc al.…”

Section: Related Workmentioning

confidence: 99%

“…Firstly, DegreeandClosenessRank() is defined to the weight function of the nodes according to the formulation (11). The nodes of physical network are sorted by their weights in descending order and the vswitch is tried to embedded into physical nodes in the queue (lines 1-2).…”

Section: Survivable Virtual Network Embedding Algorithmmentioning

confidence: 99%

See 2 more Smart Citations

On the Optimal Approach of Survivable Virtual Network Embedding in Virtualized SDN

Tan

et al. 2018

IEICE Trans. Inf. & Syst.

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SUMMARYSoftware-defined networking (SDN) has emerged as a promising approach to enable network innovation, which can provide network virtualization through a hypervisor plane to share the same cloud datacenter network among multiple virtual networks. While, this attractive approach may bring some new problem that leads to more susceptible to the failure of network component because of the separated control and forwarding planes. The centralized control and virtual network sharing the same physical network are becoming fragile and prone to failure if the topology of virtual network and the control path is not properly designed. Thus, how to map virtual network into physical datacenter network in virtualized SDN while guaranteeing the survivability against the failure of physical component is extremely important and should fully consider more influence factors on the survivability of virtual network. In this paper, combining VN with SDN, a topology-aware survivable virtual network embedding approach is proposed to improve the survivability of virtual network by an enhanced virtual controller embedding strategy to optimize the placement selection of virtual network without using any backup resources. The strategy explicitly takes account of the network delay and the number of disjoint path between virtual controller and virtual switch to minimize the expected percentage of control path loss with survivable factor. Extensive experimental evaluations have been conducted and the results verify that the proposed technology has improved the survivability and network delay while keeping the other within reasonable bounds. key words: cloud datacenter network, survivable virtual network embedding, network topology, virtual SDN, network delay

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Section: Survivable Virtual Network Embedding Algorithmmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

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On the Optimal Approach of Survivable Virtual Network Embedding in Virtualized SDN

Tan

et al. 2018

IEICE Trans. Inf. & Syst.

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“…It can improve resource utilization through network consolidation while providing isolation for security purposes or for developing and testing new network features. Some SDN management layers (such as [14], [19], [20], [21]) support network virtualization, but they mainly focus on routing and access control, and do not consider other mechanisms (such as error and flow control and resource allocation) for transport purpose, which is important for network resource utilization.…”

Section: Related Workmentioning

confidence: 99%

Multi-layer Virtual Transport Network management

Wang

Matta

2018

Computer Communications

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“…Advanced FlowVisor (ADVisor) [175] is also an extension of FlowVisor that mainly relies on the tag-based virtualisation to distinguish between tenants. OpenFlow switches are programmed to add the VLAN ID for traffic entering the network.…”

Section: Other Sdn Hypervisor Platformsmentioning

confidence: 99%

Security in software defined networks

Alharbi¹

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Software Defined Networking (SDN) is an emerging computer network paradigm and represents one of the most promising technologies to simplify network management and configuration through increased network programmability and abstraction. In contrast to traditional networks, in SDN, the control plane, which makes decisions on how to forward traffic, is separated from the data plane, which transmits traffic to selected destinations. That makes network control (via the SDN controller) more programmable, dynamic and centralised. With the higher level of abstraction that SDN provides, network administrators can more easily configure network services and manage traffic flows without having to configure a large number of individual network devices (switches and routers). The great potential of SDN has led to significant deployments in data centres, wide area networks, etc., and it is growing at a rapid pace.Security is a critical aspect of networking in general and is particularly vital in SDN. Due to its fundamentally new architecture, SDN presents new potential security vulnerabilities and risks. Security in SDN has not received much attention yet, given that it is very distinct and unique.The goal of this PhD was to address this gap and analyse the security of the SDN infrastructure, identify vulnerabilities and weaknesses, and propose corresponding solutions and improvements. The focus was on the fundamental aspects and components of SDN, in particular the building blocks of the control plane components include Topology Discovery, Address Resolution Protocol (ARP) Handling and Virtualisation Layer. Finally, the thesis thoroughly explored and investigated the most common and effective attacks against the SDN architecture.

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Generalizing Virtual Network Topologies in OpenFlow-Based Networks

Cited by 65 publications

References 6 publications

On the Optimal Approach of Survivable Virtual Network Embedding in Virtualized SDN

On the Optimal Approach of Survivable Virtual Network Embedding in Virtualized SDN

Multi-layer Virtual Transport Network management

Security in software defined networks

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