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These parameters are displayed:
◆ Reserved Power determined by – There are three modes for configuring how the ports or
attached Powered Devices (PD) may reserve power:
■ Class – Each port automatically determines how much power to reserve according to the
class to which the connected PD belongs, and reserves power accordingly. Four different
port classes exist, including 4, 7, 15.4 or 34.2 Watts.
In this mode, the Maximum Power fields have no effect.
■ Allocation – The amount of power that each port may reserve is specified. The
allocated/reserved power for each port/PD is specified in the Maximum Power fields.
■ LLDP-MED – This mode is similar to the Class mode expect that each port determines
the amount power it reserves by exchanging PoE information using the LLDP protocol and
reserves power accordingly. If no LLDP information is available for a port, the port will
reserve power using the class mode
In this mode the Maximum Power fields have no effect.
For all modes, if a port uses more power than the power reserved for hat port, it is shut
down.
◆ Power Management Mode – There are two modes for configuring when to shut down the
ports:
■ Actual Consumption – Ports are shut down when actual power consumption for all ports
exceeds the amount of power that the power supply can deliver or if the actual power
consumption for a given port exceeds the power reserved for that port. The ports are shut
down according to port priority. If two ports have the same priority, the port with the highest
port number is shut down.
■ Reserved Power – Ports are shut down when total reserved powered exceeds the
amount of power that the power supply can deliver. In this mode the port power is not
turned on if the PD requests more power than available from the power supply.
◆ Primary Power Supply - The power budget for the switch. If devices connected to the
switch require more power than the switch’s budget, the port power priority settings are
used to control the supplied power. (Range: 0-80 Watts)
◆ Port – Port identifier.
◆ PoE Mode – The PoE operating mode for a port includes these options:
■ Disabled – PoE is disabled for the port.
■ PoE – Enables PoE IEEE 802.3af (Class 4 PDs limited to 15.4W)
■ PoE+ – Enables PoE+ IEEE 802.3at (Class 4 PDs limited to 34.2W)
◆ Priority -Port priority is used when remote devices require more power than the power
supply can deliver. In this case the port with the lowest priority will be turn off starting from
the port with the highest port number.
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