350-601 Question #647: Real Exam Question with Answer & Explanation

Question

What is the impact of performing an electronic programmable logic device upgrade on a single module in a Cisco MDS 9000 Series Fabric Switch?

Options

• ATraffic is disrupted on all ports of the module being upgraded.
• BThe switch must be rebooted for the upgrade to take effect.
• CThe upgrade can be executed only from the active supervisor module.
• DThe upgrade is nondisruptive and does not require a switch reboot.

Explanation

{"question_number": 10, "question": "What is the impact of performing an EPLD upgrade on a single module in a Cisco MDS 9000 Series Fabric Switch?", "correct_answer": "A. Traffic is disrupted on all ports of the module being upgraded.", "explanation": "EPLD (Electronic Programmable Logic Device) upgrades on Cisco MDS 9000 Series switches are disruptive to the specific module being upgraded. EPLDs are firmware components embedded in FPGAs and CPLDs on line cards and supervisor modules; upgrading them requires a module reset/reload to reprogram the hardware. This causes a traffic outage on all ports of that specific module for the duration of the upgrade. However, because the MDS 9000 is a modular chassis, only the upgraded module is affected-other line card modules continue forwarding traffic normally. The entire switch does not need to be rebooted (option B), and the upgrade can be initiated from any management interface (option C is false). Option D is incorrect because EPLD upgrades are inherently disruptive, unlike ISSU (In-Service Software Upgrades).", "generated_by": "claude-sonnet", "llm_judge_score": 4}

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