By default, the automatic mode is used.
Usage
Scenario
In automatic or manual mode, priorities (Critical,
High, and Low) can be set on interfaces based on the importance of
PDs. When power consumption increases sharply, the system preferentially
supplies power to the PDs connected to the interfaces with the Critical
priority, and secondly to the PDs connected to the interfaces with
the High priority.
The automatic mode is easy to configure,
but it is frequently enabled and disabled, which may cause interface
faults. To avoid interface faults, you can set the manual mode. Differences
between the automatic and manual modes:
- In automatic mode, a PoE interface connects to a PD through an
Ethernet cable. After PoE is enabled on the interface, power is supplied
to the PD. When the power supply provided by the PSE
is insufficient, the power is preferentially supplied to the interfaces
with high power supply priorities, and the power supply to interfaces
with low power supply priorities is cut off. When the power supply
provided by the device is sufficient, the power is supplied to all
interfaces connected to PDs. If you want to cut off the power supply
to an interface, run the undo poe enable command to disable PoE
on the interface.
- In manual mode, a PoE interface connects to a PD through an Ethernet
cable. In addition to enabling PoE on the interface, you need to run
the poe { power-off | power-on
} interface command to manually power on the interface.
When the power supply provided by the PSE is close to the full load,
the PSE cannot supply power to more PDs. To let the PSE supply power
to another PD, you must manually power off an existing PD.
Follow-Up Task
After the manual power supply
management mode is set, you need to run the poe { power-off | power-on } interface command to manually determine the power supply on an interface.
Upon a device restart, you need to run the poe power-on interface command on an interface
to supply power to the connected PD. You can run the display poe information command to view the
current power supply management mode.