Configuring Non-Standard Pd Detection - HP 1920 Series User Manual

Configuring non-standard PD detection

There are standard PDs and nonstandard PDs. Usually, the PSE can detect only standard PDs and supply
power to them. The PSE can detect nonstandard PDs and supply power to them only if you enable the PSE
to detect nonstandard PDs.
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Item Description
Set the maximum power for the PoE port.
The maximum PoE interface power is the maximum power that the PoE interface
Power Max can provide to the connected PD. If the PD requires more power than the maximum
PoE interface power, the PoE interface does not supply power to the PD.
By default, the maximum power of a PoE port is 30 watts.
Set the power supply priority for a PoE port. In descending order, the power-supply
priority levels of a PoE port are critical, high, and low.
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When the PoE power is insufficient, power is first supplied to PoE ports with a
higher priority level.
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If the PoE power is overloaded and a PSE power-management-priority policy is
enabled, the PSE that has a lower priority is first disconnected to guarantee the
power supply to a new PSE that has a higher priority.
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The guaranteed remaining PoE power is the maximum PoE power minus the
power allocated to the critical PSE, regardless of whether PoE is enabled for the
PSE. If this is lower than the maximum power of the PSE, you cannot set the
power priority of the PSE to critical. Otherwise, you can set the power priority to
critical, and this PSE preempts the power of the PSE that has a lower priority
level. In this case, the PSE whose power is preempted is disconnected, but its
configuration remains unchanged. If you change the priority of the PSE from
Power Priority
critical to a lower level, other PSEs have an opportunity to be powered.
By default, the power priority of a PoE port is low.
IMPORTANT:
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A guard band of 20 watts is reserved for each PoE interface on the device to
prevent a PD from being powering off because of a sudden increase of power.
If the remaining power of the PSE is lower than 20 watts, the PoE interface with
higher priority can preempt the power of a PoE interface with lower priority to
supply power to a new PD. In this way, you can ensure normal operation of the
PoE interface with higher priority. If the power of the PoE interface with lower
priority is lower than 20 watts, for the PoE interface to operate correctly, it
supplies power again.
•
If a sudden increase of the PD power results in PSE power overload, power
supply to the PD on the PoE interface that has a lower priority is stopped to
ensure power supply to the PD that has a higher priority.
Select PoE > PoE from the navigation tree.
Click the PSE Setup tab.
The page displays the location of all PSEs, and the status of the non-standard PD detection function.
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