Abstract
Software defined networking (SDN) is an emerging network paradigm that decouples the control plane from the data plane. The data plane is composed of forwarding elements called switches and the control plane is composed of controllers. SDN is gaining popularity from industry and academics due to its advantages such as centralized, flexible, and programmable network management. The increasing number of traffics due to the proliferation of the Internet of Thing (IoT) devices may result in two problems: (1) increased processing load of the controller, and (2) insufficient space in the switches’ flow table to accommodate the flow entries. These problems may cause undesired network behavior and unstable network performance, especially in large-scale networks. Many solutions have been proposed to improve the management of the flow table, reducing controller processing load, and mitigating security threats and vulnerabilities on the controllers and switches. This paper provides comprehensive surveys of existing schemes to ensure SDN meets the quality of service (QoS) demands of various applications and cloud services. Finally, potential future research directions are identified and discussed such as management of flow table using machine learning.
Highlights
The number of internet-connected or Internet of Things (IoT) devices, and traffic flow volume in the internet has significantly increased and continues to grow
This paper provides a comprehensive survey on the efforts that have been done on optimizing the processing load of the controller, mitigating malicious attacks, flow table update operation, and improving the efficiency of flow table management to ensure stable performance of Software defined networking (SDN)
To overcome the limitation of the switch flow table storage (TCAM), OpenFlow allowed the use of a timeout mechanism to determine the life span of forwarding entry in the switch flow table [52]
Summary
The number of internet-connected or Internet of Things (IoT) devices, and traffic flow volume in the internet has significantly increased and continues to grow. The proactive approach was introduced to reduce the communication overhead involved between switches and controllers Another SDN performance issue is regarding the flow table update operation made upon the occurrence of events such as topology changes [5], network reconfiguration [6], and the creation of re-routing rules [7]. The centralized controller, flow table limitation of commercial switches, and flow table update operation should be dealt with efficiently to avoid critical performance bottleneck in the deployed production network environment of OpenFlow-SDN [5]. These three issues of SDN have gained great attention from researchers in recent years [7,8,9,10,11]. This survey focuses on OpenFlow as the standard southbound interface between switch to SDN Controller
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