Troubleshooting Poe - 3Com MSR 50 Series Configuration Manual

Troubleshooting PoE

[Sysname-GigabitEthernet5/1] quit
After the configuration takes effect, the IP phone and AR device are
powered and can work normally.
Symptom 1: Setting the priority of a PoE interface to critical fails.
Analysis:
The guaranteed remaining power of the PSE is lower than the maximum power
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of the PoE interface.
The priority of the PoE interface is already set.
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Solution:
In the former case, you can solve the problem by increasing the maximum PSE
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power, or by reducing the maximum power of the PoE interface when the
guaranteed remaining power of the PSE cannot be modified.
In the latter case, you should first remove the priority already configured.
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Symptom 2: Applying a PoE configuration file to a PoE interface fails.
Analysis:
Some configurations in the PoE configuration file are already configured.
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Some configurations in the PoE configuration file do not meet the
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configuration requirements of the PoE interface.
Another PoE configuration file is already applied to the PoE interface.
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Solution:
In case 1, you can solve the problem by removing the original configurations of
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those configurations.
In case 2, you need to need to modify some configurations in the PoE
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configuration file.
In case 3, you need to remove the application of the undesired PoE
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configuration file to the PoE interface.
Symptom 3: Provided that parameters are valid, configuring an AC input
under-voltage threshold fails.
Analysis:
The AC input under-voltage threshold is greater than or equal to the AC input
over-voltage threshold.
Solution:
You can drop the AC input under-voltage threshold below the AC input
over-voltage threshold.
Troubleshooting PoE 2185