Introduction:

Power over Ethernet(PoE) describes any of several standardized or ad-hoc systems which pass electric power along with data on twisted pair Ethernet cabling. This allows a single cable to provide both data connection and electric power to devices such as wireless access points and IP cameras.
Power sourcing equipment (PSE) is a device such as a network Switch that provides (or sources) power on the Ethernet cable. The maximum allowed continuous output power per cable in IEEE 802.3af is 15.40 W. A later specification, IEEE 802.3at, offers 25.50 W.
A powered device (PD) is a device powered by a PSE and thus consumes energy. Examples include wireless access points, IP Phones, and IP Cameras.

Only device models marked with P, PX, PXE, NPE, PE or EP support PoE or UPoE. For FS switches, device models marked with P support PoE, device models marked with U support UPoE.

Topology:

Here is a typical topology for PoE. The PDs are power devices connected to a PoE switch.

Figure. Power devices(PD) connect with PoE switch

Configurations:

Enabling PoE on all ports is mandatory for other commands.

admin@XorPlus# set poe interface all enable true
admin@XorPlus# set poe interface all threshold-mode 2
admin@XorPlus# set poe interface all max-power 32
admin@XorPlus# set poe power management-mode 3
admin@XorPlus# set poe interface all mode signal
admin@XorPlus# set poe power mode redundant
admin@XorPlus# commit

For more details, please refer to PoE Configuration Commands.

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