How does the Cisco SD-WAN Cloud OnRamp solution rate the performance of a SaaS application from a branch office to the cloud via a given path?

Monitoring packet loss, even for priority queues, is one component of performance measurement, but it does not represent the overall rating mechanism that encompasses multiple metrics.

Cisco SD-WAN's Cloud OnRamp for SaaS uses a proprietary algorithm to compute a Quality-of-Experience (QoE) score for SaaS applications. This score aggregates real-time measurements of key network parameters like loss, latency, and jitter into a single, comprehensive metric to assess application performance.

Measuring delay and jitter are critical metrics that contribute to the overall performance assessment, but they are individual parameters, not the complete method by which Cloud OnRamp rates application performance.

Counting interface errors indicates physical or data link layer issues and is typically a low-level diagnostic, not the primary method for rating end-to-end SaaS application performance in an SD-WAN context.