User-oriented network troubleshooting mechanism for Software Defined Networking

• Main Authors: Liao Shang Chuan, 廖上全
• Other Authors: Chao Han Chieh
• Format: Others
• Language: en_US
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/77838068184365745696

碩士 === 國立宜蘭大學 === 資訊工程學系碩士班 === 102 === Software Defined Networking (SDN) is a novel networking concept. It not only separates the data-plane and control-plane in switches, but also programs network functions. Researchers and programmers are able to implement ideas on switches which support OpenFlow. The switch does not restrict by any specific vendor or type, but the novel concept needs new method to verify and debug. Several studies showed that SDN needs systematical troubleshooting. It coordinates with controller and application, and verifies the switch compatibles with OpenFlow protocol and the data-plane connectivity. We investigate the capabilities of verification and debug for network data-plane. They use gathering data in the forwarding information table to check connectivity, or capture all traffic in the network then using back-traces. But some literatures point out that the most useful tool for network troubleshoot is ping or traceroute, because it is simple to use. In this thesis, we propose a debug mechanism, viz sPing. The sPing works like ping operation. We use programmable characteristic of SDN, the users are able to log the specific packets and these logs can be analyzed. The sPing checks the loop and black-hole problem. Lastly, we implement sPing on Mininet and test it on various devices, and acquire the simulation and experiment results.