QuestionQ38

Network Access

Which action occurs on a switch port that has PoE power classification override enabled?

  • A If a monitored port exceeds the maximum administrative value for power, the port is shutdown and err-disabled.
  • B When a powered device begins drawing power from a PoE switch port, a syslog message is generated.
  • C As power usage on a PoE switch port is checked, data flow to the connected device is temporarily paused.
  • D If a switch determines that a device is using less than the minimum configured power, it assumes the device has failed and disconnects it.
Explanation

With Cisco PoE power classification override, the switch can override the IEEE power class and enforce the configured maximum power allocation on the port. When inline power policing is active with the default errdisable action, a powered device that draws more than the allowed administrative power causes the switch to shut down PoE on that port and place the interface into an err-disabled state. Cisco documentation for power inline police describes this as turning off power when real-time consumption exceeds the maximum power allocation, and troubleshooting guidance shows the port being shut down and err-disabled when overdrawn.

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