Adaptive Path Selection Mechanism of Service Function Chaining for NFV Networking

• Main Authors: JIA-YI JHOU, 周佳儀
• Other Authors: Jiann-Liang Chen
• Format: Others
• Language: en_US
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/8x57sg

碩士 === 國立臺灣科技大學 === 電機工程系 === 106 === With rapid development of Internet and cloud, network service providers must increase more dedicated hardware equipment to provide more network services in limited room space. Moreover, settings and connection between devices is also complicated. The traditional way of network construction cannot meet with demands of substantial growth. Network Function Virtualization (NFV) was proposed to solve above problems. NFV can provide network functions by way of placing them with software in virtual machines. And then NFV combined with Service Function Chaining (SFC) achieve guide flow to a required service functions. With this technology can be more arbitrary to configuration required network functions, and reduce complexity of construction and management of network. In multiple Service Nodes (SNs) within NFV environment, there are a number of network functions are built. For resource-constrained and different network functional requirements. This study focuses on selection of Service Function Instances (SFIs), which are combined into Service Function Path (SFP). Thus avoiding unbalanced load in a network system and providing a service chain with higher service level agreement (SLA). Therefore, this study focuses on design of NFV-based SFC integration architecture and development of SFP Selection mechanism to flexibly provide service chain that satisfies service request. This study discusses two situation cases. By using proposed SFP Selection mechanism can improve resource utilization of SFIs, avoid load of SFIs overloading, increase number of service chains that can be serviced by overall system, and reduce packet loss rate. Compare with using proposed mechanism and without using mechanism. Case 1 that only consider load of SFIs, SFC Controller with proposed SFP Selection mechanism can improve resource utilization rate by 21.32%, reduce average load difference by 30.02%. Case 2 that more consider situation of acceptable price, SFC Controller with proposed SFP Selection mechanism can improve resource utilization by 10.31%, and reduce average load difference by 18.73%. In addition, from analysis of rejection rate, proposed mechanism improves amount of service chains that can be serviced by whole system, and reduces average packet loss rate by 1.91%.