Software Defined Networking (SDN) is a rising networking paradigm based on the concept of separation between network control plane and data forwarding plane in order to improve network utilization, simplify management, reduce operating costs and enhance the provisioning and configuration of network and telecommunication systems. This strategy grounds on the decoupling of the decision system, in charge of managing the control plane with a dedicated protocol named OpenFlow, from the underlying system, in charge of forwarding data traffic to the selected destination. The SDN Control Layer conveys all the service logic in its core element, namely the controller, that is failure-prone and thus its performance, reliability and availability are key issues for a careful design and deployment. Some unified frameworks have been proposed to assess performance and reliability/availability in data networks: these approaches are often called performability analysis. In this paper, we address a performability analysis aimed at selecting the most suitable redundancy architecture of an SDN controller hosting a certain number of virtual operator instances by solving a redundancy optimization problem on behalf of Universal Generating Function (UGF) approach conveniently tailored for a multivariate case.
Reliability analysis of the controller architecture in software defined networks
DI MAURO, MARIO;LONGO, Maurizio;POSTIGLIONE, Fabio
2015-01-01
Abstract
Software Defined Networking (SDN) is a rising networking paradigm based on the concept of separation between network control plane and data forwarding plane in order to improve network utilization, simplify management, reduce operating costs and enhance the provisioning and configuration of network and telecommunication systems. This strategy grounds on the decoupling of the decision system, in charge of managing the control plane with a dedicated protocol named OpenFlow, from the underlying system, in charge of forwarding data traffic to the selected destination. The SDN Control Layer conveys all the service logic in its core element, namely the controller, that is failure-prone and thus its performance, reliability and availability are key issues for a careful design and deployment. Some unified frameworks have been proposed to assess performance and reliability/availability in data networks: these approaches are often called performability analysis. In this paper, we address a performability analysis aimed at selecting the most suitable redundancy architecture of an SDN controller hosting a certain number of virtual operator instances by solving a redundancy optimization problem on behalf of Universal Generating Function (UGF) approach conveniently tailored for a multivariate case.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
