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    Decentralized Consistent Updates in SDN

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    Type
    Conference Paper
    Authors
    Nguyen, Thanh Dang
    Chiesa, Marco
    Canini, Marco cc
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Computer Science Program
    Date
    2017-04-10
    Permanent link to this record
    http://hdl.handle.net/10754/625573
    
    Metadata
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    Abstract
    We present ez-Segway, a decentralized mechanism to consistently and quickly update the network state while preventing forwarding anomalies (loops and blackholes) and avoiding link congestion. In our design, the centralized SDN controller only pre-computes information needed by the switches during the update execution. This information is distributed to the switches, which use partial knowledge and direct message passing to efficiently realize the update. This separation of concerns has the key benefit of improving update performance as the communication and computation bottlenecks at the controller are removed. Our evaluations via network emulations and large-scale simulations demonstrate the efficiency of ez-Segway, which compared to a centralized approach, improves network update times by up to 45% and 57% at the median and the 99th percentile, respectively. A deployment of a system prototype in a real OpenFlow switch and an implementation in P4 demonstrate the feasibility and low overhead of implementing simple network update functionality within switches.
    Citation
    Nguyen TD, Chiesa M, Canini M (2017) Decentralized Consistent Updates in SDN. Proceedings of the Symposium on SDN Research - SOSR ’17. Available: http://dx.doi.org/10.1145/3050220.3050224.
    Sponsors
    We would like to thank the anonymous reviewers and our shepherd Jia Wang for their feedback. We are thankful to Xiao Chen, Paolo Costa, Huynh Tu Dang, Petr Kuznetsov, Ratul Mahajan, Jennifer Rexford, Robert Soule, and Stefano Vissicchio for their helpful comments on earlier drafts of this paper. This research is (in part) supported by European Union's Horizon 2020 research and innovation programme under the ENDEAVOUR project (grant agreement 644960).
    Publisher
    Association for Computing Machinery (ACM)
    Journal
    Proceedings of the Symposium on SDN Research - SOSR '17
    Conference/Event name
    2017 Symposium on SDN Research, SOSR 2017
    DOI
    10.1145/3050220.3050224
    Additional Links
    http://dl.acm.org/citation.cfm?doid=3050220.3050224
    ae974a485f413a2113503eed53cd6c53
    10.1145/3050220.3050224
    Scopus Count
    Collections
    Conference Papers; Computer Science Program; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

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