A Survey of Controller Placement Problem in Software-Defined Networking

Lu, Jie; Zhang, Zhen; Hu, Tao; Peng, Yi; Lan, Julong

doi:10.1109/access.2019.2893283

Cited by 128 publications

(95 citation statements)

References 55 publications

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“…The controller selection based on shortest distance between the nodes is not the right choice to optimize the load and robustness of the network. It is found that the path latency‐based selection of number of controllers build a robust network . Optimal number of controllers are needed to improve the network performance.…”

Section: Proposed Methodsmentioning

confidence: 99%

Stateful firewall‐enabled software‐defined network with distributed controllers: A network performance study

Prabakaran

Ramalakshmi

2019

Int J Communication

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SummarySoftware-defined network (SDN) is constructed by decoupling the control and data plane from the forwarding devices. The control plane operations are managed by centralized or distributed controllers, and the data plane operation is managed by respective forwarding devices. SDN provides an easy and efficient management solutions for software-programmed consolidated middlebox in virtual machines. Additionally, SDN with centralized controller faces complications like scalability, network bottle neck, and single point failure. In this study, a stateful inspection firewall acts as a middlebox in distributed SDN-controlled network. The controller is programmed with a failure detection and recovery mechanism to provide reliability and redundancy and enhance the overall performance of the network. The objective of stateful firewall on SDN architecture is to secure the network by monitoring the current connections and maintain its state information until the connection is active. In this paper, the performance of firewall-enabled SDN with centralized and distributed controllers are measured, compared, and analyzed. The experiments are done using POX controller, and the results are verified by Mininet network emulation tool. The results show that the stateful firewall-enabled SDN with distributed controller network improves the security, reliability, availability, and overall performance of the network. In the proposed SDN, average network throughput is improved by 43%, average network delay is reduced by 4%, average channel utilization is increased by 40%, average network overhead is reduced by 26%, and average network response time is reduced by 23%. KEYWORDSdistributed controller, middlebox, OpenFlow, SDN, software-defined network, stateful firewall | INTRODUCTIONSoftware-defined network (SDN) is a promising network model that is utilized to build an adaptable and less expensive alternative for an existing network. SDN decouples the control plane and data plane from the forwarding device. The decoupled control planes from all the forwarding devices are centralized by the SDN controller. A single centralized controller network in SDN has issues like network bottle neck, which cause a single point network failure, less reliability, and scalability. Network bottle neck problem occurs in single centralized SDN controller when there is a rapid increase of ingress traffic. To solve the above-mentioned issue, distributed controllers are configured to handle ingress and egress

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Section: Proposed Methodsmentioning

confidence: 99%

Stateful firewall‐enabled software‐defined network with distributed controllers: A network performance study

Prabakaran

Ramalakshmi

2019

Int J Communication

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Section: Background and Related Workmentioning

confidence: 99%

“…In an attempt to address these questions, several selection algorithms have been presented with one or multiple objective functions: lowering network delay, improving network resilience, or a combination of thereof. [36][37][38] Heller et al introduced two selection algorithms using k-median and k-center metrics. The k-median algorithm selects controllers to minimize the minimum average shortest path lengths between SDN switches and controllers.…”

Section: Controller Placement Problemmentioning

confidence: 99%

Resilient placement of SDN controllers exploiting disjoint paths

Alenazi

Çetinkaya

2019

Trans Emerging Tel Tech

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Traditional IP networks are difficult to manage, owing to their rapid expansion and dynamic changes. Software‐defined networks are introduced to simplify network management by separating the network control plane from the packet forwarding plane. Using one or several controllers, SDN switches can be configured to forward data packets to their destinations. The controller placement problem aims to determine the number of controllers and their locations to meet network service requirements. Early approaches used the k‐median and k‐center algorithms, which select k controllers to minimize propagation latency without considering network resilience. In this paper, we developed a new nodal metric, nodal disjoint path (NDP), which measures a node's importance in terms of its diverse connectivity to other nodes. Based on NDP, we propose two algorithms, NDP‐global and NDP‐cluster, for determining the locations of the k controllers to increase network robustness against targeted attacks. We apply the two selection algorithms to four US‐based fiber‐level networks and evaluate their resilience against five centrality‐based attacks and random failures. The evaluation results indicate that selecting controllers by the NDP‐global algorithm, compared with the NDP‐cluster, k‐median, and k‐center algorithms, provides better network resilience in the face of centrality‐based attacks and random failures. The results also indicate that the NDP‐cluster algorithm has a delay performance comparable to that of the k‐median algorithm and provides higher network resilience.

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“…Second, the SDN Controller coverage should be defined carefully taking into account the density and mobility of vehicles. This helps avoiding SDN controllers' overload as well as improving the performance of vehicle-to-controller communications, and also, minimizing the number of changes in the set of deployed controllers.Even if the SDN controller placement problem has been widely covered in the literature, as described in References [13,14], most existing work focused on wired networks and aimed at computing an off-line optimal placement. In this paper, as in Reference [15], the focus is on controller placement in a SDVN context.…”

mentioning

confidence: 99%

“…Even if the SDN controller placement problem has been widely covered in the literature, as described in References [13,14], most existing work focused on wired networks and aimed at computing an off-line optimal placement. In this paper, as in Reference [15], the focus is on controller placement in a SDVN context.…”

mentioning

confidence: 99%

Towards Dynamic Controller Placement in Software Defined Vehicular Networks

Toufga

Abdellatif

Assouane

et al. 2020

Sensors

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The emerging SDVN (Software Defined Vehicular Network) paradigm promises to bring flexibility and efficient resource utilization to vehicular networks, enabling the emergence of novel Intelligent Transportation Services. However, as it was initially designed with wired network in mind, applying the SDN paradigm to a vehicular context faces new challenges related to the peculiar characteristics of this network (high node mobility and node density, and the presence of wireless links). In this paper, we focus on one of the critical architectural elements of SDVN, namely, the SDN Controller Placement, and promote the use of dynamic placement methods that take into account the dynamicity of vehicular networks' topology. We also describe the different approaches towards a dynamic controller placement and also propose an ILP (Integer Linear Programming) based dynamic placement method that adaptively readjusts the number and placement of controllers according to road traffic fluctuations. The proposed method is evaluated using a realistic traffic trace from Luxembourg City. Simulation results show that our approach outperforms the static approach as proposed in the literature.Most existing research work have been elaborated on the opportunities that the SDVN concept could bring when applied to vehicular networks [10]. However, some challenges need to be addressed to reach these expected opportunities. Among these challenges, we mention firstly, the network topology discovery, which is a crucial service in the Software Defined Vehicular Netowrk (SDVN) system [11]. Its main goal is to build and maintain an up-to-date view of the underlying network. The density and high mobility of vehicles make the design of this service a challenging task. Secondly, the connectivity between the vehicles and their controller is partly wireless [12]. In fact, vehicles can go through areas without network coverage, this could make the controller temporarily unreachable, which may impact network performance. Thirdly, the mobility of vehicles can result in frequent changes of their attached SDN controller. This impacts the established sessions with the initial controller, as well as an increase of network overhead due to inter-controller vehicles information exchange. The SDN controller placement is a key architectural element that can help mitigating the above mentioned challenges. It consists of computing the number of SDN controllers to deploy and derive their placement in the network. This choice must be done appropriately given the critical role of an SDN controller in this architecture. First, wireless link connectivity and quality must be considered in order to minimize the connectivity losses between vehicles and their controllers. Second, the SDN Controller coverage should be defined carefully taking into account the density and mobility of vehicles. This helps avoiding SDN controllers' overload as well as improving the performance of vehicle-to-controller communications, and also, minimizing the number of changes in the set of deploy...

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A Survey of Controller Placement Problem in Software-Defined Networking

Cited by 128 publications

References 55 publications

Stateful firewall‐enabled software‐defined network with distributed controllers: A network performance study

Stateful firewall‐enabled software‐defined network with distributed controllers: A network performance study

Resilient placement of SDN controllers exploiting disjoint paths

Towards Dynamic Controller Placement in Software Defined Vehicular Networks

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