poe-power backup-mode
Function
The poe-power backup-mode command sets the PoE power supply mode to the backup mode.
The undo poe-power backup-mode command restores the PoE power supply mode to the high-power mode.
By default, the PoE power supply mode is the high-power mode.
Only the S5720I-28X-PWH-SI-AC supports this command.
Format
poe-power backup-mode backup-mode [ slot slot-id ]
undo poe-power backup-mode [ slot slot-id ]
Parameters
Description |
Description |
Value |
|---|---|---|
backup-mode |
Specifies the backup mode of PoE power supplies. |
The value can only be 1. |
slot slot-id |
Specifies a slot ID. If this parameter is not specified in Stack, only the PoE power supply mode of the master switch is modified. |
The value must be set according to the device configuration. |
Usage Guidelines
Usage Scenario
- High-power mode (default): When two power modules are used, they provide 369.6 W PoE power for the first 8 electrical ports and last 16 electrical ports respectively, and the system provides 739.2 W PoE power. If one of the two power modules is faulty, the first 8 electrical interfaces provide power normally, but the PDs connected to the last 16 electrical ports are powered off and the PoE function becomes unavailable on the last 16 electrical ports. When only one power module is used, only the first 8 electrical interfaces can provide PoE power.
- PoE backup mode: The PoE power supply mode can be manually set to the backup mode using the poe-power backup-mode command. The backup mode provides 1+1 redundancy. In backup mode, the system provides 369.6 W PoE power, regardless of whether one or two power modules are used. The 369.6 W PoE power is shared by 24 electrical ports. Setting the PoE power supply mode to the backup mode can improve system stability.
Precautions
Changing the PoE power supply mode will power off the PDs connected to all ports.