Opening up ROADMs: streaming telemetry [Invited]
Jan Kundrát, Michal Vaško, Radek Krejčí, Vaclav Kubernat, Tomáš Pecka, Ondřej Havliš, Martin Šlapák, Jaroslav Jedlinský, Josef Vojtěch · Journal of Optical Communications and Networking · 2021
We present an implementation of streaming telemetry of optical metrics within open hardware reconfigurable add/drop multiplexers (ROADMs). Our key achievements are sub-second updates of high-resolution spectrum scans, and we demonstrate a sustained telemetry stream of the full C-band with a sub-GHz resolution. The telemetry streaming is implemented over a standard, Internet Engineering Task Force (IETF)-defined protocol (YANG Push) in collaboration with an open-source YANG software stack and device-specific code. As the telemetry collector, we used a common time series database (TSDB) along with a visualization dashboard. We also extended the Open Network Operating System (ONOS) software-defined network (SDN) controller to act as a telemetry receiver.