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  • Efficient topology discovery in OpenFlow-based Software Defined Networks

    Author(s)
    Pakzad, Farzaneh
    Portmann, Marius
    Tan, Wee Lum
    Indulska, Jadwiga
    Griffith University Author(s)
    Tan, Wee Lum
    Year published
    2016
    Metadata
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    Abstract
    Software Defined Networking (SDN) is a new networking paradigm, with a great potential to increase network efficiency, ease the complexity of network control and management, and accelerate the rate of technology innovation. One of the core concepts of SDN is the separation of the network’s control and data plane. The intelligence and the control of the network operation and management, such as routing, are removed from the forwarding elements (switches) and are concentrated in a logically centralised component, i.e. the SDN controller. In order for the controller to configure and manage the network, it needs to have up-to-date ...
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    Software Defined Networking (SDN) is a new networking paradigm, with a great potential to increase network efficiency, ease the complexity of network control and management, and accelerate the rate of technology innovation. One of the core concepts of SDN is the separation of the network’s control and data plane. The intelligence and the control of the network operation and management, such as routing, are removed from the forwarding elements (switches) and are concentrated in a logically centralised component, i.e. the SDN controller. In order for the controller to configure and manage the network, it needs to have up-to-date information about the state of the network, in particular its topology. Consequently, topology discovery is a critical component of any Software Defined Network architecture. In this paper, we evaluate the efficiency of the de facto standard approach to topology discovery currently implemented by the major SDN controller frameworks, and propose simple and practical modifications, which achieve a significantly improved efficiency and reduced control overhead. We have implemented our new topology discovery approach on the widely used POX controller platform, and have evaluated it for a range of network topologies via experiments using the Mininet network emulator as well as a specific topology in the OFELIA SDN testbed. Our results show that our proposed modifications achieve an up to 40% reduction in controller load compared to the current state-of-the-art approach, while delivering identical discovery functionality.
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    Journal Title
    Computer Communications
    DOI
    https://doi.org/10.1016/j.comcom.2015.09.013
    Subject
    Software engineering not elsewhere classified
    Distributed computing and systems software
    Communications engineering
    Software defined networks
    SDN
    Topology discovery
    Publication URI
    http://hdl.handle.net/10072/141366
    Collection
    • Journal articles

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