What Does PoE Power Classification Override Do on a Switch Port?
Which action is taken by switch port enabled for PoE power classification override?
Community Insight
The exam tests your knowledge of Cisco PoE power policing consequences, and the trap is picking a plausible-sounding but fictional behavior such as pausing data flow or disconnecting an under-drawing device.
This CCNA 200-301 question asks what happens on a switch port with PoE power classification override, where the switch governs power allocation rather than trusting the powered device's reported class. The only behavior among the choices that matches Cisco's documented PoE power management is the port being shut down and placed into err-disabled when the administrative power maximum is exceeded.
Option D is the tempting distractor for learners who assume the switch reacts to under-drawing devices; no PoE feature disconnects a device merely for consuming less than the configured minimum, and options B and C describe actions (bare syslog generation, temporarily pausing data) that are not how PoE monitoring works.
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Expert Analysis
Why the Answer Is Correct
Option A correctly restates Cisco's documented PoE power policing outcome: when a monitored port's power consumption exceeds the administrative maximum — either a configured ceiling or the port default — the switch issues a syslog message, shuts the port down, and places it in an err-disabled state, freeing the allocated power. This is the only option describing a real, vendor-documented PoE power-management action, which is why it must be the selected answer even though the question's wording about "classification override" is loose. As John248 quoted directly from Cisco's configuration guide, "The monitored port is shut down and error-disabled." The question is effectively testing whether you recognize the over-current consequence of PoE power limits on a Catalyst port.Why the Other Options Are Wrong
Option B describes a syslog message alone as the port's action when a device begins drawing power, but PoE monitoring does not emit syslog at initial power-up; syslog is issued only alongside the shutdown when an administrative maximum is exceeded. Option C claims data flow to the connected device is temporarily paused while power usage is checked, which is false — PoE power checks run on the power supply/priority logic and never interrupt the data path. Option D invents a rule that a device drawing less than the minimum configured power is assumed failed and disconnected; no Cisco PoE feature behaves this way, since under-drawing devices simply leave headroom unused. As PaddyInNZ argued, none of the options map cleanly to classification override itself, but A remains the only factually correct PoE behavior presented.Community Comment Notes
Most learners selected A, with TOTO1914 explaining that exceeding the configured maximum administrative power limit causes the switch to shut down the port and err-disable it. PaddyInNZ countered that "None of the answers are correct" because override means the switch ignores the PD's reported class and allocates a fixed amount instead. syougun200x likewise wondered whether "the question has a flaw in the sentence," and JNE17 advised to "focus on the answers and how they are worded" since the question stem is a distraction — an approach that leaves A as the only defensible choice.Official Reference
Exam Strategy
When a PoE or power-management question's stem seems inconsistent with the options, evaluate each option against known Cisco behavior and choose the only one that describes a real feature. Eliminate choices describing nonexistent reactions (pausing data, disconnecting under-drawers) and you will land on the shutdown/err-disabled outcome.
Frequently Asked Questions
Why doesn't the switch just pause data or disconnect a device that draws too little power?
No Cisco PoE feature disconnects a device for under-drawing power; unused allocation simply remains available. PoE monitoring only reacts when a port exceeds its administrative power maximum, triggering syslog and err-disabled.
Is option A really about classification override or about power policing?
Option A describes PoE monitoring and policing, not classification override itself, which makes the switch ignore the PD's reported class and allocate a fixed amount. It is still the only option stating a true PoE behavior, so it is the intended answer.
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