Upgrading Cisco SD-WAN WAN Edge devices requires the version to be equal to or lower than the controller’s version. Learn what happens (and why) if you try to upgrade to a higher version.
Table of Contents
Question
What is the result during a WAN Edge software upgrade process if the version of the WAN Edge software is higher than the one running on a controller device?
A. The upgrade button is greyed out.
B. The upgrade fails with a warning message.
C. The upgrade proceeds with a warning message.
D. The upgrade proceeds with no warning message.
Answer
B. The upgrade fails with a warning message.
Explanation
Cisco SD-WAN best practices and safety measures prevent upgrading WAN Edge devices to a software version higher than the one currently running on the controller. This helps avoid compatibility issues and potential network instability.
When attempting such an upgrade, the process will fail with a warning message indicating the version incompatibility.
Other options are incorrect because:
- A. Upgrade button greyed out: While possible in some scenarios, it’s not universally applicable.
- C. Upgrade proceeds with a warning message (incorrect): Upgrading to a higher version on the WAN Edge is not allowed.
- D. Upgrade proceeds with no warning message (incorrect): Upgrading with a version mismatch would result in a failure with a warning message.
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