Chapter 13
| Basic Administration Protocols
Power over Ethernet
– 381 –
Figure 240: Displaying LLDP Device Statistics (Port)
Power over Ethernet
The ECS4210-12P and ECS4210-28P 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 (IEEE 802.3af or 802.3at).
The switch’s power management allows individual port power to be controlled
within the switch’s 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.
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