Configuring Non-Standard Pd Detection - HP 830 Series Configuration Manual

Item
Power Priority

Configuring non-standard PD detection

By default, the PSE detects only IEEE 802.3af-compliant standard PDs and supply power to them.
To enable the PSE to detect nonstandard PDs:
1. Select PoE > PoE from the navigation tree.
2. Click the PSE Setup tab.
The page displays the location of all PSEs, and the status of the non-standard PD detection function.
Figure 513 PSE Setup tab
Enabling the non-standard PD detection function for a PSE
1. Select Enable in the corresponding Non-Standard PD Compatibility column.
Description
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.
•
When the PoE power is insufficient, power is first supplied to PoE ports with a higher
priority level.
•
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.
•
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 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:
•
A guard band of 19 watts is reserved for each PoE interface on the device to prevent
a PD from being powered off because of a sudden increase of power. If the
remaining power of the PSE is lower than 19 watts and no priority is configured for
a PoE interface, the PSE does not supply power to the new PD. If the remaining power
of the PSE is lower than 19 watts, but priorities are configured for PoE interfaces, the
PoE interface that has a higher priority can preempt the power of a PoE interface that
has a lower priority to ensure normal operation of the higher priority PoE interface.
•
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.
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