Exam SD-WAN-Engineer Topic 1 Question 69 Discussion

Actual exam question for Palo Alto Networks's SD-WAN-Engineer exam
Question #: 69
Topic #: 1

When planning a software upgrade for a large fleet of ION devices, what is the recommended best practice regarding the "Software Version" assigned in the Site Summary?

A. Manually log into each device and upload the new image file via USB. B. Assign the new software version to the "Global" site configuration to upgrade all 1000+ sites simultaneously. C. Use Site Tags to group sites (e.g., "Pilot", "Region-1", "Region-2") and assign the new software version incrementally to these tags to minimize risk. D. The ION devices upgrade themselves automatically whenever a new version is released by Palo Alto Networks.

Suggested Answer: C Vote an answer

Comprehensive and Detailed Explanation
The best practice for managing upgrades in a large-scale Prisma SD-WAN environment is the Canary or Phased Rollout approach, utilizing Site Tags.
Risk Mitigation: Upgrading all sites simultaneously (Option B) is highly risky. If the new software version has an unforeseen bug or compatibility issue with a specific circuit type, the entire network could face an outage.
Tag-Based Management: Administrators should create tags such as "Upgrade-Phase-1" (Pilot sites) or "Region-North". By assigning the specific Software Version to the Tag (rather than the individual site or the global default), the controller pushes the update only to that subset of devices.
Procedure:
Apply update to "Pilot" tag (5 sites). Monitor for 24-48 hours.
Apply update to "Region-1" tag (50 sites). Monitor.
Eventually, update the Global default once confidence is high.
Option A is unscalable, and Option D is incorrect as the administrator retains full control over when upgrades occur; they are not forced automatically without policy configuration.

by Drew at Jun 28, 2026, 04:41 PM

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