4.2 Article

High-speed optical networks latency measurements in the microsecond timescale with software-based traffic injection

期刊

OPTICAL SWITCHING AND NETWORKING
卷 29, 期 -, 页码 39-45

出版社

ELSEVIER SCIENCE BV
DOI: 10.1016/j.osn.2018.03.004

关键词

Latency measurements; Network measurements; High-speed optical network measurements; Software-based

资金

  1. Spanish Ministry of Economy and Competitiveness
  2. European Regional Development Fund under project TRAFICA [MINECO/FEDER TEC2015-69417-C2-1-R]
  3. European Commission [761727]

向作者/读者索取更多资源

In many optical network scenarios, such as Storage Array Network (SAN) replication, keeping latency under control is cornerstone to provide a proper Quality of Service (QoS). Hence, measuring latencies in such optical networks becomes fundamental. However, for low distances, microseconds resolution is required, which, in turn, demands ad-hoc hardware implementation for the measurement device. Alternatively, a more cost-effective solution is that of software-based methods, but up to date they were not precise enough at 10 Gbit/s or above. In this paper, we analyze current high-performance packet engines, such as DPDK, and pinpoint the issues involved when it comes to measure latencies in high-speed optical networks. Based on these findings, we propose the use of a software-based solution to measure latency. Furthermore, we also propose an extension that serves to measure bandwidth as well, with the novel concept of convoy of packet trains.

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