Question 380
During a GPU datacenter maintenance window, an engineer discovers: A high-speed AI fabric reports intermittent FEC corrections on several ports, but no link has gone fully down so the operators dismiss the errors. Which repeatable operational safeguard best prevents recurrence of this failure?
Explanation
Correct Answer
This preventive practice addresses the underlying failure (Physical signal margins can degrade well before a port reaches a hard link-down state.) and supports continued assurance through: The identified impaired link is repaired and sustained traffic no longer accumulates unacceptable lane or FEC errors.
Incorrect Answers
This prevention control targets another operational risk: A switch port suffers bursts of uncorrected symbol errors after a new transceiver is installed, but the engineer only checks interface speed. The currently reported mechanism remains: Physical signal margins can degrade well before a port reaches a hard link-down state.
This prevention control targets another operational risk: A suspected optical link fault appears only when neighboring rack doors are closed, and receiver power measurements approach the lower supported threshold. The currently reported mechanism remains: Physical signal margins can degrade well before a port reaches a hard link-down state.
This prevention control targets another operational risk: Operators run ClusterKit on only a handpicked subset of fast hosts, then claim the entire 128-node AI cluster is validated. The currently reported mechanism remains: Physical signal margins can degrade well before a port reaches a hard link-down state.