3Com Switch 8800 Advanced Software V5 Configuration Guide

1020 CHAPTER 78: POE CONFIGURATION
# Enable PoE on GigabitEthernet3/1/1, GigabitEthernet3/1/2,
GigabitEthernet5/1/1, and GigabitEthernet5/1/2.
<Sysname> system-view
[Sysname] interface gigabitEthernet 3/1/1
[Sysname-GigabitEthernet3/1/1] poe enable
[Sysname-GigabitEthernet3/1/1] quit
[Sysname] interface gigabitEthernet 3/1/2
[Sysname-GigabitEthernet3/1/2] poe enable
[Sysname-GigabitEthernet3/1/2] quit
[Sysname] interface gigabitEthernet 5/1/1
[Sysname-GigabitEthernet5/1/1] poe enable
[Sysname-GigabitEthernet5/1/1] quit
[Sysname] interface gigabitEthernet 5/1/2
[Sysname-GigabitEthernet5/1/2] poe enable
[Sysname-GigabitEthernet5/1/2] quit
# Set the power priority level of GigabitEthernet3/1/2 to critical.
<Sysname> system-view
[Sysname] interface gigabitEthernet 3/1/2
[Sysname-GigabitEthernet3/1/2] poe priority critical
[Sysname-GigabitEthernet3/1/1] quit
# Set the maximum power of GigabitEthernet5/1/1 to 9,000 milliwatts.
[Sysname] interface gigabitEthernet 5/1/1
[Sysname-GigabitEthernet5/1/1] poe max-power 9000
After the configuration takes effect, the IP phone and AR device are powered and
can work normally.
Troubleshooting PoE Symptom: Setting the priority of a PoE interface to critical fails.
Analysis:
■ The guaranteed remaining power of the PSE is lower than the maximum power
of the PoE interface.
■ The priority of the PoE interface is already set.
Solution:
■ In the former 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.
■ In the latter case, you should first remove the priority already configured.
Symptom: Applying a PoE configuration file to a PoE interface fails.
Analysis:
■ Some configurations in the PoE configuration file are already configured.
■ Some configurations in the PoE configuration file do not meet the
configuration requirements of the PoE interface.