LevelOne GEL-1061, User Manual

Page: 344 / 500

Chapter 13
| Basic Administration Protocols
Power over Ethernet
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Ports can be set to one of three power priority levels, critical, high, or low. To control
the power supply within the switch’s budget, ports set at critical to high priority
have power enabled in preference to those ports set at low priority. For example,
when a device connected to a port is set to critical priority, the switch supplies the
required power, if necessary by denying power to ports set for a lower priority
during bootup.
Note: For more information on using the PoE provided by this switch refer to the
Installation Guide .
Setting the Switch’s
Overall PoE Power
Budget
Use the Administration > PoE > PSE (Configure Global) page to set the maximum
PoE power budget for the switch (power available to all Gigabit Ethernet ports).
Parameters
These parameters are displayed:
◆
PoE Maximum Available Power – The power budget for the switch (i.e., power
available to all switch ports). If devices connected to the switch require more
power than the switch budget, the port power priority settings are used to
control the supplied power.
◆
PoE Maximum Allocation Power – Sets a power budget for the switch.
(Range: 50000-740000 milliwatts; Default: 125000 milliwatts)
◆
Compatible Mode – Allows the switch to detect and provide power to
powered devices that were designed prior to the IEEE 802.3af PoE standard.
(Default: Disabled)
The switch automatically detects attached PoE devices by periodically
transmitting test voltages that over the Gigabit Ethernet copper-media ports.
When an IEEE 802.3af or 802.3at compatible device is plugged into one of these
ports, the powered device reflects the test voltage back to the switch, which
may then turn on the power to this device. When the compatibility mode is
enabled, this switch can detect IEEE 802.3af or 802.3at compliant devices and
the more recent 802.3af non-compliant devices that also reflect the test
voltages back to the switch. It cannot detect other legacy devices that do not
reflect back the test voltages.
For legacy devices to be supported by this switch, they must be able to accept
power over the data pairs connected to the RJ-45 ports.
Web Interface
To set the overall PoE power budget for switch:
1.
Click Administration, PoE, PSE.
2.
Select Configure Global from the Step list.