Poe System Settings - D-Link xStack Reference Manual

®
xStack DGS-3620 Series Layer 3 Managed Stackable Gigabit Switch Web UI Reference Guide
The Switch includes the following PoE features:
Auto-discovery recognizes the connection of a PD (Powered Device) and automatically sends power to it.
The Auto-disable feature occurs under two conditions: firstly, if the total power consumption exceeds the
system power limit; and secondly, if the per port power consumption exceeds the per port power limit.
Active circuit protection automatically disables the port if there is a short. Other ports will remain active.
Based on 802.3af/at PDs receive power according to
the following classification:
Class Maximum power available to PD
0
1
2
3
4
The PoE System Settings window is used to assign a power limit and power disconnect method for the whole PoE
system. To configure the Power Limit for the PoE system, enter a value between 37W and 760W for the Switch in
the Power Limit field. When the total consumed power exceeds the power limit, the PoE controller (located in the
PSE) disconnects the power to prevent overloading the power supply.

PoE System Settings

To view the following window, click System Configuration > PoE > PoE System Settings, as shown below:
The following parameters can be configured:
Parameter
Unit
Power Limit (37-
760)
Power Disconnect
Method
12.95W
3.84W
6.49W
12.95W
25.5W
Figure 3-8. PoE System Settings window
Description
Select the unit you wish to configure. Tick the All check box to select all units.
Sets the limit of power to be used from the Switch's power source to PoE ports. The user
may configure a Power Limit between 37W and 760W for the DGS-3620-28PC and
DGS-3620-52P. The default setting is 760W.
The PoE controller uses either Deny Next Port or Deny Low Priority Port to offset the
power limit being exceeded and keeps the Switch's power at a usable level. Use the drop
down menu to select a Power Disconnect Method. The default Power Disconnect
Method is Deny Next Port. Both Power Disconnection Methods are described below:
Deny Next Port – After the power limit has been exceeded, the next port attempting to
power up is denied, regardless of its priority. If Power Disconnection Method is set to
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
PSE provides power according to the following
classification:
Class
0
1
2
3
User Define
35
Max. power used by PSE
15.4W
4W
7W
15.4W
35W