Abstract
Software-defined networking (SDN) is an innovative architecture that separates the control plane from the data plane to simplify and speed up the management of large networks. This means the control logic has been moved from the network hardware level to the centralized control management level. Therefore, the use of the OpenFlow Discovery Protocol (OFDP) is one of the most common protocols used to discover the network topology in a data plane and then transmit it to the control plane for management. However, OFDP has various shortcomings in its performance such as exchanging too many messages between both levels (control and data), which in turn increases the load on the SDN-Controller. Additionally, since the application layer depends entirely on the network topologies plotted in the control plane, it is very important to obtain accurate network topology information from data plane. Therefore, after providing background on topology discovery protocols to the reader, we will concentrate on performance issues. The present study identifies and discuss the primary concerns involved in the complex query process, infrastructure, influencing factors, and challenges for the topology discovery process. Furthermore, this paper will present several recent studies that have overcome and enhanced these issues. In addition, open discussion and future work concerning these issues are also discussed.
Highlights
Software-defined networking (SDN) architecture is a promising solution to overcomes the limitations of traditional network architecture in terms of control, scalability, and management [1,2]
In ForCES, the Link Layer Discovery Protocol (LLDP) advertisements are periodically sent between SDN-Switches and if there is a change in the topology, the affected SDN-Switches will notify the SDN-Controller about this change
In standard SDN, the SDN-Controller is responsible for maintaining an updated network topology through using OpenFlow Discovery Protocol (OFDP) protocol to discover the links between SDN-Switches in the data plane
Summary
Software-defined networking (SDN) architecture is a promising solution to overcomes the limitations of traditional network architecture in terms of control, scalability, and management [1,2]. The basic idea of SDN is to separate the control plane from the data plane [3], where the control logic is extracted from network hardware and is centralized into an independent control plane. The process of separating the control plane from the data plane is not new, but it has limited to some applications such as NETCONF, SANE, and Ethane [4,5]. Recently, this method of managing networks of various kinds has been introduced.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
