kumoh national institute of technology
Networked Systems Lab.

A. A. Pranata, T.-S. Jun, and D.-S. Kim, "Overhead Reduction Scheme for SDN-based Data Center Networks", Computer Standards & Interfaces (IF: 1.465, ISSN: 0920-5489), vol. 63, pp. 1-15, 2018 (A)
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Date : 2018-02-13
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This paper proposes a framework on controller and switches to reduce overhead of controller-switch communication for SDN-based Data Center Networks (DCN). The proposal focuses on OpenFlow (OF), a well-known, sophisticated protocol for SDN, to reduce the number of control messages, consisting of both PACKET_IN and PACKET_OUT messages handled by the OF controller during rule installation on OF switches flow tables. The controller receives the first packet of a flow for forwarding path determination and selectively chooses switches for rule installation. Moreover, to ensure lower loads for the controller to handle, the proposed framework adds an out-of-band controller and avoids a hybrid architecture. Extensive simulation shows significant results on reduced controller workload. The performance provides a mutual trade-off by considerably improving rule matching rate in the presence of slightly enhanced number of flow entries, conserving resources on both OF controller and OF switches for SDN-based DCN operation. As a consequence, network latency is reduced while throughput is enhanced, which offers a great promise in the future deployment of DCN.

Available online: https://www.sciencedirect.com/science/article/pii/S0920548917304427