Poe Port Settings - D-Link xStack DGS-3420 Series Reference Manual

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch Web UI Reference Guide
Legacy PD
Click Apply to implement changes made.
NOTE: The Power Limit for this Switch without a Redundant Power Supply (RPS) is 370W. When the
user adds an RPS, like the DPS-700, for the DGS-3420-28PC and the DGS-3420-52P, the
Power Limit must be set to 740W.

PoE Port Settings

To view the following window, click System Configuration > PoE > PoE Port Settings, as show below:
The following parameters can be configured:
Parameter
From Port / To Port
State
Time Range
Priority
Power Limit
Deny Next Port, the system cannot utilize out of its maximum power capacity. The
maximum unused watt is 19W.
Deny Low Priority Port – After the power limit has been exceeded, the next port
attempting to power up causes the port with the lowest priority to shut down so as to
allow the high-priority and critical priority ports to power up.
Use the drop-down menu to enable or disable detecting legacy PDs signal.
Figure 2-9 PoE Port Settings window
Description
Select a range of ports from the drop-down menus to be enabled or disabled for PoE.
Use the drop-down menu to enable or disable ports for PoE.
Select a range of the time to the port set as POE. If Time Range is configured, the power
can only be supplied during the specified period of time.
Use the drop-down menu to select the priority of the PoE ports. Port priority determines
the priority which the system attempts to supply the power to the ports. There are three
levels of priority that can be selected, Critical, High, and Low. When multiple ports
happen to have the same level of priority, the port ID will be used to determine the
priority. The lower port ID has higher priority. The setting of priority will affect the order of
supplying power. Whether the disconnect method is set to deny low priority port, the
priority of each port will be used by the system to manage the supply of power to ports.
This function is used to configure the per-port power limit. If a port exceeds its power
limit, it will shut down.
Based on 802.3af/802.3at, there are different PD classes and power consumption
ranges;
Class 0 – 0.44~12.95W
Class 1 – 0.44~3.84W
Class 2 – 3.84~6.49W
Class 3 – 6.49~12.95W
Class 4 – 29.5W
The following is the power limit applied to the port for these five classes. For each class,
the power limit is a little more than the power consumption range for that class. This
takes into account any power loss on the cable. Thus, the following are the typical
values;
Class 0 – 16200mW
16