A service level agreement is an agreement between the service providers and the customer. SLAs commonly refer to measurements made to understand how the service is received by the customer, and they are of interest to the service provider and the customer alike. In Netrounds, all metrics related to service degradation are transformed into errored seconds (ES) by setting appropriate thresholds for the metrics.
The level of SLA fulfillment given in monitoring results is calculated as 100 – ES (%). With Netrounds' default SLA thresholds, we obtain the following:
- If 100 – ES < 99.5%, the service level is classified as SLA Bad (red SLA icon ), and you should consider taking immediate action to locate and solve the problem. For example, an ES percentage of 1% equates to an SLA fulfillment of 99%, which is in the SLA Bad region.
- If 99.5% <= 100 – ES < 99.95%, that is, if the ES percentage is in the range 0.05% ... 0.5%, the service level is classified as SLA Acceptable (orange SLA icon ).
- If 100 – ES >= 99.95%, that is, if the ES percentage is below 0.05%, the service level is classified as SLA Good (green SLA icon ).
These figures provide a quick way to understand if the service level is high enough, or if there are quality issues degrading the service, and if so what causes these problems. SLA thresholds set in Netrounds should of course correspond to what is set down in the actual SLA, or to other agreed SLA levels, in order for measurement results to be accepted by all parties. How to change the default SLA levels is described on this page.
Note: The coloring of the SLA icons is determined entirely by the above criteria and is thus independent of the color range used for errored seconds.