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Linksys
Linksys
If at any time during the connectivity an attached PD requires more power
from the device than the configured allocation allows (no matter if the device
is in Class Limit or Port Limit mode), the device does the following:
Maintains the up/down status of the PoE port link
•
Turns off power delivery to the PoE port
•
Logs the reason for turning off power
•
Feature Configuration
The Feature Configuration page enables selecting either the Port Limit or
Class Limit PoE mode
These settings are entered in advance When the PD actually connects
and is consuming power, it might consume much less than the maximum
power allowed
Output power is disabled during power-on reboot, initialization, and system
configuration to ensure that PDs are not damaged
To configure PoE on the device and monitor current power usage:
STEP 1 Click Configuration > Port Management > PoE > Feature Configuration
STEP 2 Enter the values for the following fields:
Power Mode—Select one of the following options:
•
Port Limit—The maximum power limit per each port is configured by the
•
user
Class Limit—The maximum power limit per port is determined by the
•
class of the device, which results from the Classification stage
NOTE:
When you change from Port Limit to Class Limit, or vice versa, you must
disable PoE ports, and enable them after changing the power configuration
The following counters are displayed for the device:
Nominal Power—The total amount of power in watts that the device can
•
supply to all the connected PDs
Consumed Power—Amount of power in watts that is currently being
•
consumed by the PoE ports
Available Power—Nominal power in watts minus the amount of
•
consumed power
STEP 3 Click Apply to save the PoE properties
Port Limit Power Mode
To configure port limit power mode do the following:
STEP 1 Click Configuration > Port Management > PoE > Port Limit Power
Mode The list of fields below is for Port Limit Power Mode
The following fields are displayed for ports on which the port limit power
mode is enabled:
PoE Status—Enable or disable PoE on the port
•
Power Priority Level—Port priority is low, high, or critical, for use when
•
the power supply is low For example, if the power supply is running at
99% usage and port 1 is prioritized as high, but port 3 is prioritized as low,
port 1 receives power and port 3 might be denied power
Power Allocation Limit (mW)—Power in milliwatts allocated to the port
•
Max Power Allocation (mW)—Maximum amount of power permitted on
•
this port
Power Consumption (mW)—Amount of power assigned to the powered
•
device connected to the selected interface
Class—Power class of device
•
Operational Status—Displays whether Power Limit mode is enabled or
•
disabled on the port
STEP 2 Select a port and click Edit Enter the fields as described above
STEP 3 Click Apply The PoE settings for the port are written to the Running
Configuration file
Class Limit Power Mode
To configure class limit power mode, do the following:
•
STEP 1 Click Configuration > Port Management > PoE > Class Limit Power
Mode
The following fields are displayed for ports on which the port limit power
mode is enabled:
PoE Status—Enable or disable PoE on the port
•
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