Configure Power Supply Priorities
With the power supply priority function, if the total power of a PSE is insufficient for powering all PDs, key PDs have the priority to obtain power. Through this function, you can configure the mode in which key PDs are powered.
Configuration Condition
Before configuring power supply priorities, ensure that:
- The global PoE function is enabled.
- The interface PoE function is enabled.
Configure a PoE Power Management Mode
Table 12-10 Configuring a PoE Power Management Mode
|
Step
|
Command
|
Description
|
|
Enter the global configuration mode.
|
configure terminal
|
-
|
|
Configure PoE power management mode.
|
power manage { all | system-id { all | subsystem-id } } { dynamic-fifs | dynamic-priority | static-fifs | static-priority }
|
Optional.
The default power management mode is the dynamic First In First Served (FIFS).
|
Configure Power Supply Priority of an Interface
If the PoE power management mode is the dynamic priority mode, when the power supply of the PSE is insufficient, the PD that is connected to the interface with a higher power supply priority is first powered. If the power supply priorities of the interfaces are the same, the PD that is connected to the interface with smaller number is powered first.
Table 12-11 Configuring the Power Supply Priority of an Interface
|
Step
|
Command
|
Description
|
|
Enter the global configuration mode.
|
configure terminal
|
-
|
|
Configure the PoE power management to dynamic priority.
|
power manage { all | system-id { all | subsystem-id } } dynamic-priority
|
Optional.
The default power management mode is the dynamic priority.
|
|
Enter the layer-2 Ethernet interface configuration mode.
|
interface interface-name
|
-
|
|
Configure the power supply priority of an interface.
|
power priority { critical | high | medium | low }
|
Optional.
The default power supply priority is low.
|
Switch
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