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Enabling Reachability Across Multiple Domains Without Controller Synchronization in SDN

Computers, Materials & Continua 2021年第10期69卷 945-965页

作者： Nauman Khan Rosli Bin Salleh Ihsan Ali Zahid Khan Noman Mazhar Roobaea Alroobaea Fahad Almansour Usman Ali Department of Computer System and Technology Faculty of Computer Science and Information TechnologyUniversity of MalayaMalaysia Department of Computer Science and IT University of MalakandPakistan Robotics and Internet-of-Things Lab Prince Sultan UniversityRiyadhSaudi Arabia Department of Computer Science College of Computers and Information TechnologyTaif UniversityTaif21944Saudi Arabia Department of Computer Science College of Sciences and Arts RassQassim UniversityBuraydah51452Saudi Arabia

Software-defined networking(SDN)makes network agile and flexible due to its programmable *** extensive network has multiple domains in SDN for the scalability and performance of the ***,the inter-domain link is also crucial for the stability of the entire network on the data plane *** than one inter-domain connection enhances the scalability of the data plane ***,it faces a reachability problem with the principal root,which causes forwarding loops and packet drops in the network,thereby degrading network *** proposed solution is a multiple controller architecture;however,this approach increases the complexity and affects network ***,in this study,we propose a framework that avoids forwarding loops and packet drops without the synchronization of multiple-domain controllers in the network using an avoid loop with test packet ***,we collect the link status for improved routing and load balancing for the upcoming flow across inter-domain links to prevent congestion and increase throughput in real *** proposed methodology can significantly reduce the controller workload against multiple controller architecture,minimize flow setup latency,and improve throughput.

关键词： Multiple domain packet drop forwarding loop load balancing SDN multiple controller

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EtherFuse: An Ethernet watchdog

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ACM SIGCOMM COMPUTER COMMUNICATION REVIEW 2007年第4期37卷 253-264页

作者： Elmeleegy, Khaled Cox, Alan L. Ng, T. S. Eugene Rice Univ Dept Comp Sci Houston TX 77251 USA

Ethernet is pervasive. This is due in part to its ease of use. Equipment can be added to an Ethernet network with little or no manual configuration. Furthermore, Ethernet is self-healing in the event of equipment failure or removal. However, there are scenarios where a local event can lead to network-wide packet loss and congestion due to slow or faulty reconfiguration of the spanning tree. Moreover, in some cases the packet loss and congestion may persist indefinitely. To address these problems, we introduce the EtherFuse, a new device that can be inserted into an existing Ethernet to speed the reconfiguration of the spanning tree and prevent congestion due to packet duplication. EtherFuse is backward compatible and requires no change to the existing hardware, software, or protocols. We describe a prototype EtherFuse implementation and experimentally demonstrate its effectiveness. Specifically, we characterize how quickly it responds to network failures, its ability to reduce packet loss and duplication, and its benefits on the end-to-end performance of common applications.

关键词： management performance reliability experimentation network watchdog Ethernet reliability count to infinity forwarding loop

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Detection of Flow Violation in Distributed SDN Controller 5

Detection of Flow Violation in Distributed SDN Controller

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5th International Conference on Emerging Applications of Information Technology (EAIT)

作者： Halder, Biswajit Barik, Mridul S. Mazumdar, Chandan Jadavpur Univ Kolkata India

ISBN: (纸本)9781538637197

Software Defined Network (SDN) paradigm has revolutionized the way enterprise networks are designed by separating the control and data plane. It introduces a programmable network architecture which enables rapid and open innovation in different network functions that are allowed to install flow rules in forwarding elements via protocols like OpenFlow. Packet processing also becomes easier due to availability of packet information across different layers. But all these benefits may turn into great challenges because of the use of some features in OpenFlow. One of them, the set_field feature is widely used by network functions like firewall, router, load balancer etc. to modify packet header while in transit. Like distributed firewall setup, where rule in one firewall may conflict with that of other, in SDN, if multiple controller is used for individual networks or subnetwork within an organization, then change in flow rule in one controller may conflict with flow rules in other controller. Un-monitored management of flow may cause packets to loop through switches in single or multiple network, adversely affecting the network performance. In this paper, we introduce a mechanism using a directed graph representation to detect forwarding rules that cause forwarding loop, direct or indirect flow violation in a distributed controller environment. This helps network administrators to avoid possible security breaches, network congestion or even complete network failure caused by misconfiguration in security policies in different subnetworks.

关键词： Software-Defined Network(SDN) Firewall Directed Graph Flow rule Violation forwarding loop Security

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A Graph based Formalism for Detecting Flow Conflicts in Software Defined Network 11

A Graph based Formalism for Detecting Flow Conflicts in Soft...

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IEEE International Conference on Advanced Networks and Telecommunications Systems (ANTS)

作者： Halder, Biswajit Barik, Mridul Sankar Mazumdar, Chandan Jadavpur Univ Kolkata India

ISBN: (纸本)9781538623480;9781538623473

Software Defined Network (SDN) paradigm has revolutionized the way enterprise networks are designed by way of separating the control and data plane. It introduces a programmable network architecture which enables rapid and open innovation in different network functions that are allowed to install flow rules in forwarding elements via protocols like OpenFlow. Packet Processing also becomes easier and lucrative due to availability of packet information across different layers. But all these benefits may turn into great challenges because of the use of some features in OpenFlow itself. One of them, the set field feature is widely used by network functions like firewall, router, load balancer etc. to modify packet header while in transit. Un-monitored use of this feature may cause packets to loop through switches, adversely affecting the network performance. Also, different network functions may install flow rules that directly or indirectly may violate each other. In this paper, we introduce a graph based formalism to detect forwarding rules that cause forwarding loop, direct or indirect flow violation. This helps network administrators to avoid possible security breaches, network congestion or even complete network failure.

关键词： Software-Defined Network(SDN) Firewall Directed Analytic Graph(DAG) Flow rule Violation forwarding loop

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EtherFuse: An Ethernet watchdog 07

EtherFuse: An Ethernet watchdog

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ACM SIGCOMM 2007 Conference

作者： Elmeleegy, Khaled Cox, Alan L. Ng, T. S. Eugene Rice Univ Dept Comp Sci Houston TX 77251 USA

ISBN: (纸本)9781595937131

关键词： management performance reliability experimentation network watchdog Ethernet reliability count to infinity forwarding loop

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