H3C Technologies H3C S7500E Series Switches - Manual (Page 118)

5-19
[Sysname-GigabitEthernet3/0/2] poe priority critical
[Sysname-GigabitEthernet3/0/2] quit
# Enable PoE on GigabitEthernet 5/0/2, and set its maximum power to 9000 milliwatts.
[Sysname] interface gigabitethernet 5/0/2
[Sysname-GigabitEthernet5/0/2] poe enable
[Sysname-GigabitEthernet5/0/2] poe max-power 9000
After the configuration takes effect, the IP telephones and AP devices are powered and can
work normally.
Troubleshooting PoE
Symptom 1: Setting the priority of a PoE interface to critical fails.
Analysis:
z The guaranteed remaining power of the PSE is lower than the maximum power of the PoE
interface.
z The priority of the PoE interface is already set.
Solution:
z In the first case, you can solve the problem by increasing the maximum PSE power, or by
reducing the maximum power of the PoE interface when the guaranteed remaining power
of the PSE cannot be modified.
z In the second case, you should first remove the priority already configured.
Symptom 2: Applying a PoE profile to a PoE interface fails.
Analysis:
z Some configurations in the PoE profile are already configured.
z Some configurations in the PoE profile do not meet the configuration requirements of the
PoE interface.
z Another PoE profile is already applied to the PoE interface.
Solution:
z In the first case, you can solve the problem by removing the original configurations of those
configurations.
z In the second case, you need to modify some configurations in the PoE profile.
z In the third case, you need to remove the application of the undesired PoE profile 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.