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FS980M Series Fast Ehternet Managed Switches Installation Guide
The lowest priority level is Low. This is the default setting. Ports set to this
level only receive power if all of the ports assigned to the other two levels
are already receiving power. As with the other levels, if there is not enough
power to support all of the ports set to the Low priority level, power is
provided to the ports based on port number, in ascending order.
Power allocation is dynamic. Ports supplying power to powered devices
may cease power transmission if the switch's power budget is at maximum
usage and new powered devices, connected to ports with higher priorities,
become active.
You can use port prioritization on dual power supply PoE switches to
protect your important networking devices from loss of power should one
of the power supplies fail or lose power. By limiting the power
requirements of the critical devices connected to a switch to less than 185
watts, the PoE power provided by a single power supply, a switch will have
sufficient power to support the critical devices even if it has only one
functional power supply.
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