Zyxel GS1900-8HP [106/246] Chapter 19 configuration port

Chapter 19 Configuration: Port

GS1900 Series User’s Guide

106

Figure 99 Configuration > Port > PoE > Port > Edit

The following table describes the labels in this screen.

Table 66 Configuration > Port > PoE > Port > Edit

LABEL DESCRIPTION

Port

Port List Displays the list of port index numbers that are being configured.

PD State Select Enable to provide power to a PD connected to the port or Disable so the port

cannot receive power from the Switch.

PD Priority This field is not available for the SFP or SFP+ ports.

When the total power requested by the PDs exceeds the total PoE power budget on the

Switch, you can set the PD priority to allow the Switch to provide power to ports with higher

priority.

Select Critical to give the PD connected to this port the highest priority.

Select High to set the Switch to assign the remaining power to the port after all critical

priority ports are served.

Select Medium to set the Switch to assign the remaining power to the port after all critical

and high priority ports are served.

Select Low to set the Switch to assign the remaining power to the port after all critical,

high and medium priority ports are served.

Power-Up Set how the Switch provides power to a connected PD at power-up.

802.3af - the Switch follows the IEEE 802.3af Power over Ethernet standard to supply

power to the connected PDs during power-up.

Legacy - the Switch can provide power to the connected PDs that require high inrush

currents at power-up.

Pre-802.3at - the Switch initially offers power on the port according to the IEEE 802.3af

standard, and then switches to support the IEEE 802.3at standard within 75 milliseconds

after a PD is connected to the port. Select this option if the Switch is performing 2-event

Layer-1 classification (PoE+ hardware classification) or the connected PD is NOT performing

Layer 2 power classification using Link Layer Discovery Protocol (LLDP).

802.3at - the Switch supports the IEEE 802.3at High Power over Ethernet standard and

can supply power of up to 30W per Ethernet port. IEEE 802.3at is also known as PoE+ or

PoE Plus. An IEEE 802.3at compatible device is referred to as Type 2. Power Class 4 (High

Power) can only be used by Type 2 devices. If the connected PD requires a Class 4 current

when it is turned on, it will be powered up in this mode.