LevelOne GEL-1061, Руководство пользователя

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Chapter 13
| Basic Administration Protocols
Power over Ethernet
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3.
Set the maximum PoE power provided by the switch, and enable the
compatible mode if required.
4.
Click Apply.
Figure 216: Setting the Switch’s PoE Budget
Setting the Port
PoE Power Budget
Use the Administration > PoE > PSE page to set the maximum power provided to a
port.
Command Usage
◆
This switch supports both the IEEE 802.3af PoE and IEEE 802.3at-2009 PoE Plus
standards. To ensure that the correct power is supplied to powered devices
(PD) compliant with these standards, the first detection pulse from the switch is
based on 802.3af to which the 802.3af PDs will respond normally. It then sends
a second PoE Plus pulse that causes an 802.3at PD to respond as a Class 4
device and draw Class 4 current. Afterwards, the switch exchanges information
with the PD such as duty-cycle, peak and average power needs.
◆
All the RJ-45 ports support both the IEEE 802.3af and IEEE 802.3at standards.
For the GEP-1061, the total PoE power delivered by all ports cannot exceed the
maximum power budget of 125W.
The number of ports which can supply maximum power simultaneously to
connected devices is listed in the following table. In this table, EPS refers to the
optional external power supply.
◆
If a device is connected to a switch port and the switch detects that it requires
more than the power budget set for the port or to the overall switch, no power
is supplied to the device (i.e., port power remains off ).
Table 26: Maximum Number of Ports Providing Simultaneous Power
Switch 30W (802.3at) 15.4W (802.3af) 7.5W (802.3af)
GEP-1061 4 8 8