Dell N1100-ON, Reference Manual

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Switch Management Commands
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Power Over Ethernet Commands
The Dell EMC Networking PoE solution implements the PoE+ specification
(IEEE 802.3at) for power sourcing equipment (PSE). IEEE 802.3at allows
power to be supplied to Class 4 PD devices that require power up to 34.2
Watts. This allows the PoE+ enabled network switches and routers to be used
for deployment with devices that require more power than the 802.3AF
specification allows. PoE+ 802.3at is compatible with 802.3AF.
The Dell EMC Networking N3024P/N3048P switches support delivery of up
to 62W of power on the first 12 interfaces of each stack unit. The Dell EMC
Networking N2128PX-ON supports PoE 60W on the four 2.5G interfaces.
The Dell EMC Networking N3132PX-ON supports PoE 60W on all copper
ports.
NOTE:
This section applies to the N1108P-ON/N1124P-ON/N1148P-
ON/N1524P/N1548P/N2024P/N2048P/N2128PX-ON/N3024P/N3048P/N3132PX-ON
switches.
Flexible Power Management
The Dell EMC Networking PoE solution provides power management which
supports power reservation, power prioritization and power limiting. The
operator can assign a priority to each PoE port. When the power budget of
the PoE switch has been exhausted, the higher priority ports are given
preference over the lower priority ports. Lower priority ports are forcibly
stopped to supply power in order to provide power to higher priority ports.
The static power management feature allows operators to reserve a
guaranteed amount of power for a PoE port. This is useful for powering up
devices which draw variable amounts of power and provide them an assured
power range within which to operate. Class based power management
allocates power at class limits as opposed to user defined limits.
In the Dynamic Power management feature, power is not reserved for a given
port at any point of time. The power available with the PoE switch is
calculated by subtracting the instantaneous power drawn by all the ports from
the maximum available power. Thus, more ports can be powered at the same
time. This feature is useful to efficiently power up more devices when the
available power with the PoE switch is limited.