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Port Management
Configuring PoE
STEP 3
Cisco Small Business SG200 Series 8-port Smart Switches Administration Guide
Configure the following settings:
•
PoE—Check the Enable box to configure the port as a PSE.
•
Power Priority Level—Select Critical, High, or Low to configure the port
priority level, for the delivery of power to an attached device.
The switch might not be able to supply power to all connected devices that
request it. The port priority determines which ports supply power when
adequate power capacity is not available for all enabled ports. For ports that
have the same priority level, the lower-numbered port has higher priority. For
a system delivering peak power to a certain number of devices, if a new
device is attached on a high-priority port, power is shut down to a device on
a low-priority port, and the new device is powered up.
•
Power Limit Type— Select one of the following methods to limit the power
that the switch provides to a connected device.
-
Dot3AF—The maximum power that can be delivered by the port is
limited by the detected IEEE 802.3af class.
-
User-defined—The maximum power that can be delivered by the port
is specified by the user. If you select this option, specify a value in the
Power Allocation field.
-
LLDP-MED—The maximum power that can be delivered by the port is
limited by the value in LLDP-MED TLVs received from a port device. The
value specified by the device should be in the range of 3-16.2 watts. If it
is not in this range, then the default value of 16.2 watts is used.
Note: If the selected Power Limit Type is LLDP-MED, then the priority
setting from the remote device is not honored; instead the switch uses
the Power Priority Level setting configured for the port.
-
Dot3AF and LLDP-MED—The maximum power that can be delivered
by the port is limited by the value in LLDP-MED TLVs received from a
port device. The value specified by the device should be in the range of
3-16.2 watts. If it is not in this range, then the maximum power is limited
by the IEEE 802.3AF class.
-
User-Defined and LLDP-MED—The maximum power that can be
delivered by the port is limited by the value in LLDP-MED TLVs received
from a port device. The value specified by the device should be in the
range of 3-16.2 watts. If it is not in this range, then the maximum power is
limited by the value that you specify in the Power Allocation field.
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