Web Management Guide-R07

Table Of Contents
Chapter 13
| Basic Administration Protocols
Power over Ethernet
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Power over Ethernet
The ECS2100-10PE/10P and ECS2100-28P/28PP switches can provide DC power to a
wide range of connected devices, eliminating the need for an additional power
source and cutting down on the amount of cables attached to each device. Once
configured to supply power, an automatic detection process is initialized by the
switch that is authenticated by a PoE signature from the connected device.
Detection and authentication prevent damage to non-compliant devices (prior to
IEEE 802.3af).
The switchs power management enables individual port power to be controlled
within the switchs power budget. Port power can be automatically turned on and
off for connected devices, and a per-port power priority can be set so that the
switch never exceeds its power budget. When a device is connected to a switch
port, its power requirements are detected by the switch before power is supplied. If
the power required by a device exceeds the power budget of the port or the whole
switch, power is not supplied.
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 Switchs
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). If
the power demand from devices connected to the switch exceeds the power
budget, the switch uses port power priority settings to limit the supplied power.
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.
(ECS2100-10PE: 50000-65000 milliwatts; Default: 65000 mW
ECS2100-10P: 50000-125000 milliwatts; Default: 125000 mW
ECS2100-28P: 50000-200000 milliwatts; Default: 200000 mW
ECS2100-28PP: 50000-370000 milliwatts without external power supply,