POE power supply

Created: Oct 16, 2019 07:35:06Latest reply: Oct 16, 2019 07:44:41 64 1 0 0
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Can the POE power supply reserved by the switch be adjusted? What happens to my device when the power is not enough?

  • x
  • convention:

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jason_hu
Admin Created Oct 16, 2019 07:44:41 Helpful(0) Helpful(0)

Hello@ster
The poe power-reserved command sets the percentage of the reserved PoE power against the total PoE power. The reserved power should not be set greater than 20%. If the reserved PoE power is greater than 20% of the total PoE power, the power capacity of the device is affected.
The device can dynamically allocate power to each interface according to the power consumption of each interface. The power consumption of a PD keeps changing when the PD is running. The system periodically calculates the total power consumption of all the PDs. If the total power consumption exceeds the upper threshold of the device, the system cuts off the power of the PDs on the interfaces of low priority to ensure that other PDs can run normally.

Sometimes, however, the power consumption increases sharply and the available power of the system cannot support the burst increase of power. At this time, the system has not calculated and found that the total power consumption exceeded the upper threshold; therefore, the system does not cut off power low-priority interfaces in time. As a result, the PoE power supply is shut down for overload protection, and all PDs are powered off
  • x
  • convention:

All Answers
jason_hu
jason_hu Admin Created Oct 16, 2019 07:44:41 Helpful(0) Helpful(0)

Hello@ster
The poe power-reserved command sets the percentage of the reserved PoE power against the total PoE power. The reserved power should not be set greater than 20%. If the reserved PoE power is greater than 20% of the total PoE power, the power capacity of the device is affected.
The device can dynamically allocate power to each interface according to the power consumption of each interface. The power consumption of a PD keeps changing when the PD is running. The system periodically calculates the total power consumption of all the PDs. If the total power consumption exceeds the upper threshold of the device, the system cuts off the power of the PDs on the interfaces of low priority to ensure that other PDs can run normally.

Sometimes, however, the power consumption increases sharply and the available power of the system cannot support the burst increase of power. At this time, the system has not calculated and found that the total power consumption exceeded the upper threshold; therefore, the system does not cut off power low-priority interfaces in time. As a result, the PoE power supply is shut down for overload protection, and all PDs are powered off
  • x
  • convention:

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