In a Prisma SD-WAN environment experiencing voice quality degradation, which initial action is recommended?

When troubleshooting voice quality degradation in a Prisma SD-WAN environment, the recommended initial action is to analyze the performance data provided by the platform. Prisma SD-WAN offers extensive real-time and historical analytics for path performance, including critical metrics for voice traffic like latency, jitter, and packet loss. Reviewing these analytics allows an administrator to correlate the reported voice issues with specific network path behavior. This data-driven approach is essential for accurately identifying the root cause (e.g., a poorly performing ISP link) before implementing any corrective measures. Acting without this analysis, such as by modifying thresholds or switching paths, would be premature.

A. Immediately modify path quality thresholds: This is a configuration change, not a diagnostic step. Modifying thresholds without understanding the underlying issue can mask the problem or cause unintended consequences.

C. Switch all VoIP traffic to backup paths: This is a reactive mitigation strategy, not an initial troubleshooting action. It bypasses the crucial step of identifying why the primary path is failing.

D. Request an RMA of the ION devices: This is an extreme measure and should only be considered a last resort after all network, path, and configuration issues have been thoroughly investigated and ruled out.

1. Palo Alto Networks

Prisma SD-WAN Administrator’s Guide: The "Monitor Application Performance" section details how to use the monitoring tools to investigate application-specific issues. It states

"To monitor application performance

select Monitor > Applications. The Application Performance monitoring page allows you to view the health of your business-critical applications... You can view metrics such as MOS-Score

Transaction Time

Jitter

Latency

and Packet Loss." This directly supports reviewing analytics as the primary step.

Reference: Palo Alto Networks Prisma SD-WAN Administrator’s Guide

"Monitor" section

"Monitor Application Performance" subsection.

2. Palo Alto Networks

Prisma SD-WAN Administrator’s Guide: The "Monitor Path Quality and Performance" section describes how to analyze the health of individual WAN paths. It explains that administrators can view "real-time and historical data for each path between two ION devices

" including "Latency

Jitter

Packet Loss

and Path MOS." This is the exact data needed to diagnose voice quality issues.

Reference: Palo Alto Networks Prisma SD-WAN Administrator’s Guide

"Monitor" section

"Monitor Path Quality and Performance" subsection.