How are firmware updates handled in MEF SD-WAN?

• A. Manual updates per device
• B. Hardware replacement
• C. Centralized orchestration with staged rollouts, version control, compatibility checks, and rollback capability
• D. Random automatic updates

Answer: (C)

Firmware updates in MEF SD-WAN are handled by a centralized orchestration system that manages all edge devices together. This approach pushes updates through a central controller rather than updating each device manually.

The updater uses staged rollouts, meaning it first deploys the new firmware to a small subset of devices. The health and performance of those devices are monitored before expanding the update to the rest of the network. This minimizes risk and helps catch issues before they affect the whole WAN.

Version control keeps track of which firmware versions are deployed where, ensuring consistency across the network and enabling easy auditing and rollback if needed. Compatibility checks are performed to verify that the new firmware works with the device hardware, current configurations, licenses, and any dependent features, preventing situations that could disrupt services.

Rollback capability is built in so that if the update causes problems, the system can automatically revert devices to a known-good previous version, preserving service continuity.

This centralized, controlled approach aligns with MEF SD-WAN goals of automated, scalable, and safe software management. It’s not manual per-device updating, not hardware replacement, and not random automatic updates, which would introduce unnecessary risk.