Self-Monitoring SDN Switch Network Measurement
Date Issued
2015
Date
2015
Author(s)
Yen-Chen, Tien
Abstract
Software-defined networking architecture with OpenFlow makes network programmable that centralized controller can decide forwarding rule in every switch dynamically according to network status. Existing measurements gather flow-level information, and using topology and flow path to construct link utilization table. To react rapidly to network changing, some works use TCP sequence numbers to quickly calculate flow rate and leverage port mirroring to decrease latency. However, not all protocol has sequence numbers as byte counter of the flow, and port mirroring cause large overhead. In this paper, we present a two-tier measurement architecture that uses both port counter and OpenFlow StatsReq (request) and StatsRes (response) message to extract global view of the network. We let switch use port counter to monitor itself, and send the link state message to the controller. Based on the link utilization table, updated by switch message, the controller finds the congested link and queries flows information to change forwarding behavior.
Subjects
Networking Measurement
Software-De?ned Networking
Traf?c Engineering
Type
thesis
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ntu-104-R02944034-1.pdf
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