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inS_CnGE28FX4TX_rEv–
08/31/12 PAGE 88
INSTALLATION AND OPERATION MANUAL
CNGE28FX4TX
Tech SupporT: 1.888.678.9427
Power over Ethernet (PoE)
PoE Configuration - Reserved Power determined
There are three modes for configuring how the ports/PDs may reserve power.
Label
Description
Allocated mode In this mode the user allocates the amount of power that each port
may reserve. The allocated/reserved power for each port/PD is
specified in the Maximum Power fields.
Class mode
In this mode each port automatic determines how much power to
reserve according to the class the connected PD belongs to, and
reserves the power accordingly. Three different port classes exist and
one for 4, 7 and 15.4 Watts. (In this mode the Maximum Power fields
have no effect.)
LLDP-MED mode This mode is similar to the Class mode expect that each port
determine 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 reserved power for the port, the port is shut
down.