Performance State and Validity Aggregation on Entity Level
Metrics are aggregated on entities such as NEs, sections, health monitors and the health monitoring session. Each such entity has an aggregated (worst-case) performance state and validity, based on the underlying metrics. Aggregated state and validity are determined by applying the following precedence of state and validity of the individual metrics:
• Performance State: Bad > Poor > Fair > Ok > Unmonitored > Unavailable;
• Validity: Outdated > Current > No Data.
Examples of (aggregated performance state, aggregated validity):
• (Ok, Current) indicates: All metrics are ‘Ok’ and ‘Current’.
• (Ok, Outdated) indicates: All metrics are ‘Ok’, one or multiple metrics are ‘Outdated’.
• (Poor, Current) indicates: Worst metric state is 'Poor', all metrics are 'Current'.
• (Fair, Outdated) indicates: Worst metric state is 'Fair', one or multiple metrics are ‘Outdated’.
• (Unmonitored, Current) indicates: All metrics without any threshold, all metrics are 'Current'.
• (Unavailable, Outdated) indicates: Performance state not evaluated as all metrics are ‘Outdated’.
• (Unavailable, No Data) indicates: Performance state not evaluated as all metrics are missing.