When planning a software upgrade for a large fleet of ION devices, what is the...

Comprehensive and Detailed Explanation

The best practice for managing upgrades in a large-scale Prisma SD-WAN environment is theCanary or Phased Rolloutapproach, utilizingSite 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 theTag(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.