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Understanding SLA Performance Score for Applications, Links, Sites, and Tenants

This topic explains the following SLA performance scores:

Application Score

CSO supports Application Quality of Experience (AppQoE) to improve the user experience at the application level. In real time-optimized SD-WAN networks, CSO monitors application traffic using passive probes, which are inline probes sent along with the application traffic. Based on various parameters collected from the passive probes, CSO assigns a score to each of the applications. Based on the sampling rate you specified as part of the traffic type profile, CSO sends passive probes to detect packet loss, jitter, and violations in RTT. If the probe detects any of these issues, a syslog is generated and a violation count is added for the session.

The following metrics are used to calculate the application score:

Note Application score is available only in real time-optimized SD-WAN networks.

Site Score

For AppQoE enabled (real time-optimized SD-WAN) networks, site score is calculated as an aggregate of individual parameters across all applications in the site. For information about application score calculation, see Application Score.

Tenant Score

Tenant score is calculated as the average value of site scores. For information about site score calculation, see Site Score.

Link score is calculated based on the following SLA parameters collected using AppQoE active probes (in real time-optimized networks) or RPM probes:

For VoIP traffic, the link score calculation also considers the R-Value and MOS.

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