5 Configuration D-Link Web Smart Switch User Manual
Figure 58 – PoE > PoE Port Setting
PoE Enable: Select to enable or disable the PoE function by ports.
Power Limit: This function allows you to manually set the port power current limitation to be given to the PD.
To protect the DES-1228P and the connected devices, the power limit function will disable the PoE function
of the port when the power is overloaded. Select from "Class 1", "Class 2", "Class 3" and "Auto" for the
power limit. "Auto" will negotiate and follow the classification from the PD power current based on the
802.3af standard.
Power over Ethernet (PoE) > PoE System Settings (Only for DES-1228P)
This page will display the PoE status including System Budget Power, Support Total Power, Remainder
Power, and The ratio of system power supply.
Figure 59 – PoE > PoE System Setting
System Power Threshold: When the ratio of the system power supply is larger than or smaller than the
System Power Threshold Setting, the Switch will send trap events to the Management Station.
Note: When there is a system power shortage
with the PD, the Switch will enforce the PoE port
priority management. The lower port numbers will
have priority over the higher port numbers. For
example, Port 1 > Port 2 > ... > Port 24.
QoS > 802.1p/DSCP Priority Settings
QoS is an implementation of the IEEE 802.1p standard that allows network administrators to reserve
bandwidth for important functions that require a larger bandwidth or that might have a higher priority, such as
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