Implementing and Operating Cisco Data Center Core Technologies (DCCOR) — Question 298

What is the impact of a nondisruptive upgrade on fabric and modular switches?

Answer options

• A. The upgrade disrupts the control plane for more than 120 seconds.
• B. During the upgrade, new devices cannot log in to the fabric.
• C. If a zone server merge is in progress, the upgrade continues without interruption.
• D. When the installation is complete, the system BIOS must be updated.

Correct answer: B

Explanation

Option B is correct because during a nondisruptive upgrade, new devices are indeed blocked from logging into the fabric to maintain stability. Option A is incorrect as the upgrade is designed to be nondisruptive, meaning it should not cause such a long interruption. Option C is also wrong because a zone server merge can cause issues if not managed properly during an upgrade. Option D is not relevant to the context of a nondisruptive upgrade, as BIOS updates are not a mandatory part of this process.