scholarly journals Generation and collection of data for normal and conflicting flows in software defined network flow table

2021 ◽  
Vol 22 (1) ◽  
pp. 307
Author(s):  
Mutaz Hamed Hussien Khairi ◽  
Sharifah H. S. Ariffin ◽  
N. M. Abdul Latiff ◽  
Kamaludin Mohamad Yusof
Keyword(s):  
Network Flow ◽  
Transmission Control Protocol ◽  
Research Work ◽  
Software Defined Network ◽  
Transmission Control ◽  
Policy Rules ◽  
Performance Metric ◽  
Flow Table ◽  
Average Change ◽  
New Form

<a name="_Hlk31039004"></a><span lang="EN-US">In terms of network simplification and regulation, Software Defined Networking (SDN) is a new form of infrastructure that offers greater adaptability and flexibility. SDN, however, is an invention that is logically centralized. </span><span>In addition, the optimization of the control plane and data plane in SDN has become an area deserving of more attention. The flow in OpenFlow has been one of the essential parameters in the SDN standards, in which every individual flow includes packet matching fields, flow priority, separate counters, instructions for packet forwarding, flow timeouts and a cookie. This research work is conducted in order to produce and collect flows from the OpenFlow switch in two scenarios; in normal flows and when conflict policy rules are enforced in the network. In this article, the throughput is required to review and evaluate the conflict impact on two protocols as a performance metric; the Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP) that flows via a forwarded plane. During the simulation of the SDN OpenFlow network, the metrics are tested using MININET. The results demonstrate that the existence of SDN conflict rules allows TCP and UDP to have a significant average change in bandwidth that eventually affects the network and operations performance.</span>

scholarly journals The impact of firewall on TCP and UDP throughput in an openflow software defined network

2020 ◽  
Vol 20 (1) ◽  
pp. 256
Author(s):  
Mutaz Hamed Hussien Khairi ◽  
Sharifah H. S. Ariffin ◽  
N. M. Abdul Latiff ◽  
Kamaludin Mohamad Yusof ◽  
M. K. Hassan ◽  
...  
Keyword(s):  
Transmission Control Protocol ◽  
Network Activity ◽  
Software Defined Network ◽  
Control Plane ◽  
Transmission Control ◽  
Performance Metric ◽  
And Control ◽  
The Impact ◽  
Average Drop

Software Defined Networking (SDN) is an emerging networking paradigm that provides more flexibility and adaptability in terms of network definition and control. However, SDN is a logically centralized technology. Therefor the control plane (i.e. controller) scalability in SDN in particular, is also one of the problems that needs further focus. OpenFlow is one of the protocol standards in SDN, which allow the separation of the controller from the forwarding plane. The control plane has an SDN embedded firewall and is able to enforce and monitor the network activity. This firewall can be used to control the throughput. However, it may affect SDN performance. In this paper, throughput will be used as a performance metric to evaluate and assess the firewall impact on two protocols; Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) that passes through the forwarding planes. The evaluations have been verified through simulating the SDN OpenFlow network using MININET. The results show that an implementation of firewall module in SDN creates a significant 36% average drop for TCP and 87% average drop for UDP in the bandwidth which eventually affect the quality of the network and applications.

scholarly journals CoAP-Based Streaming Control for IoT Applications

Electronics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 1320
Author(s):  
Joong-Hwa Jung ◽  
Moneeb Gohar ◽  
Seok-Joo Koh
Keyword(s):  
Flow Control ◽  
Transmission Control Protocol ◽  
Buffer Size ◽  
Lossy Networks ◽  
Transmission Control ◽  
Error Handling ◽  
Streaming Applications ◽  
Throughput Enhancement ◽  
Iot Applications ◽  
Data Message

The Constrained Application Protocol (CoAP) is a representative messaging protocol for Internet of Things (IoT) applications. It is noted that a lot of IoT-based streaming applications have been recently deployed. Typically, CoAP uses User Datagram Protocol (UDP) as its underlying protocol for lightweight messaging. However, it cannot provide reliability, since it is based on UDP. Thus, the CoAP over Transmission Control Protocol (TCP) was recently proposed so as to provide reliability. However, the existing schemes do not provide the error handling and flow controls suitably for IoT-based streaming applications. This tends to induce throughput degradation in wireless lossy networks. In this paper, we propose a CoAP-based streaming control (CoAP-SC) scheme, which is an extension of CoAP over UDP with error handling and flow control for throughput enhancement. The proposed CoAP-SC scheme is designed by considering the sequence number of data message, the use of ACK messages, and the buffer size of sending buffer. To do this, a new CoAP option is defined. For performance analysis, the proposed scheme is implemented and compared with the existing schemes. From the testbed experimentations in various network environments, we see that the proposed CoAP-SC scheme can provide better throughput than the existing CoAP-based schemes by performing the error handling and flow control operations effectively.

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