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How to measure the speed of light with programmable data plane hardware?

Author:Ralf Kundel, Fridolin Siegmund, Boris Koldehofe
Date:September 2019
Kind:In proceedings - use for conference & workshop papers
Book title:Proceedings of the ACM/IEEE Symposium on Architectures for networking and communications systems
Research Area(s):Network Mechanisms & QoS
Abstract:Driven by real-time applications such as IIoT, TSN and vehic- ular networks, the optimization of networks and its elements regarding latency and throughput becomes more and more important. With this demo we show how latencies of network components can be identified within nanosecond accuracy by use of commodity P4 hardware. We show a measured propagation speed of 5ns/m in fiber optical cables. Besides that, our approach scales up to 100Gbit/s link speed by the aggregation of many low-cost load generators to a flexible software-based load generation.
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