Port Management
PoE
Cisco Sx350, SG350X, SG350XG, Sx550X & SG550XG Series Managed Switches, Firmware Release 2.2.5.x 172
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• Power Consumption—Displays the amount of power in milliwatts assigned to the pod
device connected to the selected interface.
• Overload Counter—Displays the total number of power overload occurrences.
• Short Counter—Displays the total number of power shortage occurrences.
• Denied Counter—Displays number of times the pod device was denied power.
• Absent Counter—Displays the number of times that power was stopped to the pod
device, because the pod device was no longer detected.
• Invalid Signature Counter—Displays the times an invalid signature was received.
Signatures are the means by which the pod device identifies itself to the PSE. Signatures
are generated during pod device detection, classification, or maintenance.
STEP 4 Click Apply. The PoE settings for the port are written to the Running Configuration file.
Statistics
This page displays the power consumption trend, which is the average power consumption
over time. This is useful for monitoring and debugging of PoE behavior.
The device stores PoE port consumption values (in units of watts) over time. This enables
calculating and displaying the average PoE consumption over specified time of day/week/
month, and enables detecting trends. Information is provided for each interface and for the
device as a whole.
PoE consumption readings are taken every 1 minute. The daily, weekly and monthly statistics
are saved in flash memory, so that they are still available after reboot.
A sample's average PoE consumption per port/device is as follows:
Sum of all PoE consumption readings in a period / Number of minutes in the sampling
period.
27.0 watt
3 15.4 watt
4 30.0 watt
Class Maximum Power Delivered by Device Port
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