標題: Performance modeling and comparison of NFV integrated with SDN: Under or aside?
作者: Fahmin, Ahmed
Lai, Yuan-Cheng
Hossain, Md Shohrab
Lin, Ying-Dar
資訊工程學系
Department of Computer Science
關鍵字: Software-defined networking;Network function virtualization;M/M/1 queuing model;OpenFlow
公開日期: 1-Jul-2018
摘要: Software Defined Networking (SDN) focuses on the separation of data and control plane, while network function virtualization (NFV) decouples network functions from underlying hardware. Combining SDN with NFV would have many benefits, but the problem is how to integrate them. There are two possible architectures for such integration: the controller interacts with virtualized network functions (VNFs), or the switch interacts with VNFs. In this paper, the former is referred to as NFV under the controller (NFV_C) while the latter is called NFV aside the controller (NFV_AC). To the best of our knowledge, there is no analytical model for mathematically investigating the performance of such architectures. This paper therefore reports on the analytical modeling of SDN with NFV under or aside the controller. We model and analyze these two SDN + NFV architectures using an M/M/1 queuing model and validate our analysis with various simulations. We show that the analytical results match the simulation results very well. Furthermore, a packet delay reduction of 68.83% can be achieved for NFVAC over NFVC, meaning that NFVAC is a better architecture for integrating SDN with NFV. We also consider feedback from the VNF to the switch. For low loads there is delay increase of 35.42% for high feedback (90%) in comparison with low feedback (10%). In the case of high loads we recorded a delay increase of 66.64%.
URI: http://dx.doi.org/10.1016/j.jnca.2018.04.003
http://hdl.handle.net/11536/145112
ISSN: 1084-8045
DOI: 10.1016/j.jnca.2018.04.003
期刊: JOURNAL OF NETWORK AND COMPUTER APPLICATIONS
Volume: 113
起始頁: 119
結束頁: 129
Appears in Collections:Articles