A more reliable Primary-Backup Controller Scheme for Byzantine Fault Tolerance in Software Defined Networks
| Autor: | Po-Hung Kuo, 郭柏宏 |
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| Rok vydání: | 2019 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 107 Software-Defined Networking (SDN) allows administrator to configure and to program the data plane from the control plane with a more efficient and flexible manner. However, logically centralized controller plane suffers from the Single Point of Failure (SPOF) problem; And distributed controller plane, on the other hand, is immune to SPOF problem but is vulnerable to other security problems. As an example, Byzantine fault could cause the distributed control plane lose consistency. Previous researches like Li et al. proposed an architecture to solve the Byzantine fault issue, but their approach has performance issue. Mohan et al. developed another architecture to increase the performance, but it introduces a new security vulnerability. This study refers to the above architecture and develops an improved design to defend against Byzantine fault. According to the results of the conducted experiments, the performance losses of the proposed approach are from 6.2% to 8.2% with sharing controllers, and 4.6% to 6.8% when without sharing controllers, separately. Since this approach is able to eliminate the aforementioned security issue, we consider the exchange of this performance lost for security acceptable. Keywords: Software-Defined Network, Byzantine Generals Problem, Replica Controller |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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