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    РаспрСдСлСнная отказоустойчивая ΠΏΠ»Π°Ρ‚Ρ„ΠΎΡ€ΠΌΠ° управлСния для ΠΏΡ€ΠΎΠ³Ρ€Π°ΠΌΠΌΠ½ΠΎ-ΠΊΠΎΠ½Ρ„ΠΈΠ³ΡƒΡ€ΠΈΡ€ΡƒΠ΅ΠΌΡ‹Ρ… сСтСй

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    The architecture of the high availability distributed control plane for SDN/OpenFlow networks are considered. High availability is achieved by redundancy of controller instances, active switch-controller communications, computing resources and tools for a controller instance failure and overloading detection and recovery. The proactive backup controller allocation algorithm which allows to minimize the time to repair in the case of a single controller instance failure is discussed. The algorithm for controller load-balancing allows dynamically reconfigure the control plane with a minimum number of switch control transfer operations to avoid controller instance overloading. The initial experimental results of the proposed algorithms for the HA distributed SDN control plane are described.Π’ Ρ€Π°ΠΌΠΊΠ°Ρ… исслСдования рассматриваСтся ΠΏΡ€ΠΎΠ±Π»Π΅ΠΌΠ° обСспСчСния отказоустойчивости распрСдСлСнной ΠΏΠ»Π°Ρ‚Ρ„ΠΎΡ€ΠΌΡ‹ управлСния для ΠΏΡ€ΠΎΠ³Ρ€Π°ΠΌΠΌΠ½ΠΎ-ΠΊΠΎΠ½Ρ„ΠΈΠ³ΡƒΡ€ΠΈΡ€ΡƒΠ΅ΠΌΡ‹Ρ… сСтСй. ЦСлью исслСдования являСтся Ρ€Π°Π·Ρ€Π°Π±ΠΎΡ‚ΠΊΠ° Π°Ρ€Ρ…ΠΈΡ‚Π΅ΠΊΡ‚ΡƒΡ€Ρ‹ ΠΈ ΠΏΡ€ΠΈΠ½Ρ†ΠΈΠΏΠΎΠ² ΠΎΡ€Π³Π°Π½ΠΈΠ·Π°Ρ†ΠΈΠΈ отказоустойчивой распрСдСлСнной ΠΏΠ»Π°Ρ‚Ρ„ΠΎΡ€ΠΌΡ‹ управлСния для ПКБ. ΠžΡ‚ΠΊΠ°Π·ΠΎΡƒΡΡ‚ΠΎΠΉΡ‡ΠΈΠ²ΠΎΡΡ‚ΡŒ распрСдСлСнной ΠΏΠ»Π°Ρ‚Ρ„ΠΎΡ€ΠΌΡ‹ управлСния ПКБ достигаСтся Π·Π° счСт рСзСрвирования ΠΊΠΎΠ½Ρ‚Ρ€ΠΎΠ»Π»Π΅Ρ€ΠΎΠ², рСзСрвирования Π°ΠΊΡ‚ΠΈΠ²Π½Ρ‹Ρ… соСдинСний ΠΌΠ΅ΠΆΠ΄Ρƒ ΠΊΠΎΠΌΠΌΡƒΡ‚Π°Ρ‚ΠΎΡ€ΠΎΠΌ ΠΈ нСсколькими ΠΊΠΎΠ½Ρ‚Ρ€ΠΎΠ»Π»Π΅Ρ€Π°ΠΌΠΈ, рСзСрвирования Π²Ρ‹Ρ‡ΠΈΡΠ»ΠΈΡ‚Π΅Π»ΡŒΠ½Ρ‹Ρ… рСсурсов ΠΈ использования Π΄ΠΎΠΏΠΎΠ»Π½ΠΈΡ‚Π΅Π»ΡŒΠ½Ρ‹Ρ… ΠΏΡ€ΠΎΠ³Ρ€Π°ΠΌΠΌΠ½Ρ‹Ρ… инструмСнтов для обнаруТСния ΠΎΡ‚ΠΊΠ°Π·ΠΎΠ², прСдотвращСния ΠΏΠ΅Ρ€Π΅Π³Ρ€ΡƒΠ·ΠΎΠΊ ΠΈ восстановлСния управлСния ΡΠ΅Ρ‚ΡŒΡŽ. Π’ Ρ€Π°Π±ΠΎΡ‚Π΅ приводится Π°Π»Π³ΠΎΡ€ΠΈΡ‚ΠΌ распрСдСлСния управлСния ΠΊΠΎΠΌΠΌΡƒΡ‚Π°Ρ‚ΠΎΡ€Π°ΠΌΠΈ ΠΌΠ΅ΠΆΠ΄Ρƒ ΠΊΠΎΠ½Ρ‚Ρ€ΠΎΠ»Π»Π΅Ρ€Π°ΠΌΠΈ ΠΏΠ»Π°Ρ‚Ρ„ΠΎΡ€ΠΌΡ‹ управлСния, Π²Ρ‹Π±ΠΎΡ€Π° Ρ€Π΅Π·Π΅Ρ€Π²Π½Ρ‹Ρ… ΠΊΠΎΠ½Ρ‚Ρ€ΠΎΠ»Π»Π΅Ρ€ΠΎΠ² для ΠΊΠ°ΠΆΠ΄ΠΎΠ³ΠΎ ΠΊΠΎΠΌΠΌΡƒΡ‚Π°Ρ‚ΠΎΡ€Π°, Ρ‡Ρ‚ΠΎ позволяСт ΠΌΠΈΠ½ΠΈΠΌΠΈΠ·ΠΈΡ€ΠΎΠ²Π°Ρ‚ΡŒ врСмя восстановлСния Π² случаС ΠΎΠ΄ΠΈΠ½ΠΎΡ‡Π½Ρ‹Ρ… ΠΎΡ‚ΠΊΠ°Π·ΠΎΠ² ΠΊΠΎΠ½Ρ‚Ρ€ΠΎΠ»Π»Π΅Ρ€ΠΎΠ². Алгоритм балансировки Π½Π°Π³Ρ€ΡƒΠ·ΠΊΠΈ ΠΌΠ΅ΠΆΠ΄Ρƒ ΠΊΠΎΠ½Ρ‚Ρ€ΠΎΠ»Π»Π΅Ρ€Π°ΠΌΠΈ позволяСт динамичСски ΠΏΠ΅Ρ€Π΅ΠΊΠΎΠ½Ρ„ΠΈΠ³ΡƒΡ€ΠΈΡ€ΠΎΠ²Π°Ρ‚ΡŒ ΠΏΠ»Π°Ρ‚Ρ„ΠΎΡ€ΠΌΡƒ управлСния с ΠΌΠΈΠ½ΠΈΠΌΠ°Π»ΡŒΠ½Ρ‹ΠΌ количСством ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΉ ΠΏΠ΅Ρ€Π΅Π΄Π°Ρ‡ΠΈ управлСния ΠΊΠΎΠΌΠΌΡƒΡ‚Π°Ρ‚ΠΎΡ€Π°ΠΌΠΈ, Ρ‡Ρ‚ΠΎΠ±Ρ‹ ΠΏΡ€Π΅Π΄ΠΎΡ‚Π²Ρ€Π°Ρ‚ΠΈΡ‚ΡŒ ΠΏΠ΅Ρ€Π΅Π³Ρ€ΡƒΠ·ΠΊΡƒ ΠΊΠΎΠ½Ρ‚Ρ€ΠΎΠ»Π»Π΅Ρ€Π°. ΠŸΡ€Π΅Π΄ΡΡ‚Π°Π²Π»Π΅Π½Ρ‹ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ ΡΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½ΠΎΠ³ΠΎ исслСдования ΠΏΡ€Π΅Π΄Π»ΠΎΠΆΠ΅Π½Π½Ρ‹Ρ… Π°Π»Π³ΠΎΡ€ΠΈΡ‚ΠΌΠΎΠ²

    METHOD OF CHOOSING A CONFIGURATION OF A HIGH AVAILABILITY DISTRIBUTED CONTROL PLATFORM FOR TRANSPORT SOFTWARE-DEFINED NETWORKS

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    The method of choosing a configuration of a high availability distributed control platform (HA DCP) for transport software-defined networks is considered.To provide fault tolerance to single controller failures the following aspects are affected in this problem: the choice of the controller instance location in the nodes of the transport SDN, the choosing of the primary and backup controllers for each switch, determining the optimal number of active controllers for distributed control platform. The minimization of delays in the transmission of control messages between the controller and the switch is a criterion for optimizing the controller placement. In the case of a single controller failure, the management of the switches is distributed among the active backup controllers. A complex method for solving this problem is proposed, including algorithms on graphs, clustering algorithms, and an algorithm for solving the Boolean linear programming problem, which allows selecting the location of the controllers in the network and the configuration of the primary and backup controller for each switch. The proposed method is implemented as a software tool. An experimental investigation of the developed method on the topologies of real transport networks is carried out

    Fault-Tolerance Distributed Control Plane for Software Defined Networks

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    The architecture of the high availability distributed control plane for SDN/OpenFlow networks are considered. High availability is achieved by redundancy of controller instances, active switch-controller communications, computing resources and tools for a controller instance failure and overloading detection and recovery. The proactive backup controller allocation algorithm which allows to minimize the time to repair in the case of a single controller instance failure is discussed. The algorithm for controller load-balancing allows dynamically reconfigure the control plane with a minimum number of switch control transfer operations to avoid controller instance overloading. The initial experimental results of the proposed algorithms for the HA distributed SDN control plane are described
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