Errored Seconds (ES) is a central concept in Netrounds. If one or several quality degradations occur during one second, this second is marked as an errored second (1 ES). Quality metrics are continuously monitored by means of thresholds, most of which are user-configurable. For example, if the ES threshold for packet loss is set to 1%, and the packet loss rate is higher than 1% during a one-second interval, an errored second will be triggered.
Several types of network statistics will generate errored seconds in Netrounds, such as throughput, one-way-delay, packet loss, and jitter. All of those mentioned have user-configurable thresholds.
ES provides a quick overview of how well your network and services perform over a certain time period, and is tightly related to Service Level Agreements (SLA). ES is visualized as a percentage, and as you zoom in and drill down into your measurement results, the ES percentage is automatically calculated for the currently displayed time interval.