Locating Deteriorated Links by Network-Assisted Multicast Proving on Open Flow Networks

With the penetration of cloud computing and contents delivery networking, flexible and dynamic traffic engineering in a network connecting globally-distributed datacenters is demanded, which is often centrally managed based on OpenFlow technology. To maintain a high quality of service of the network, detecting and locating deteriorated (e.g., lossy) links is essential. Therefore, in this paper, a framework of actively monitoring both directions of all full-duplex (virtual) links of an OpenFlow-based network is proposed. By designing particular schemes of routing the probe packets along a multicast tree and ordering the statistics collection from selected switches, the proposed framework can promptly locate highly lossy links with a minimized load on both data-plane and control-plane incurred by the measurement. In addition, the proposed schemes are computationallylightweight. Our proto-type OpenFlow implementation is tested on Mininet to show its feasibility. The numerical simulation also demonstrates the effectiveness of our proposal.IEEE Symposium on Computers and Communications, June 30 - July 3rd, 2019, Barcelona, Spai