The poe legacy enable command enables the power sourcing equipment (PSE) to check the compatibility of power devices (PDs).
The undo poe legacy enable command disables the PSE from checking the compatibility of PDs.
By default, the PSE does not check the capability of PDs.
Usage Scenario
After the switch is enabled to check the compatibility of PDs, the switch can detect and provide power to the PDs that do not comply with the 802.3af or 802.3at standard or the standard PDs that are detected as non-standard PDs because of the external environment. If compatibility check is disabled, the switch cannot provide power to the non-standard PDs.
After interfaces are enabled to check the compatibility of PDs, the interfaces can provide power to both standard and non-standard PDs. This configuration does not affect the power supply of standard PDs. That is, the interfaces can still provide power to standard PDs after the poe legacy enable command is configured.
Precautions
After the power supply mode of an interface is set to PoE++ using the poe bt-inrush enable command, the poe legacy enable command does not take effect on this interface.
The poe force-power command and the poe legacy enable command are mutually exclusive. When configured on the same interface, the later configured command takes effect and the earlier configured command is cleared.
If the interface is connected to a non-PD device, enabling PD compatibility check may damage this non-PD device. Exercise caution when you use this command. After enabling PD compatibility check on a PoE switch, you need to manually disable this function if you need to remove the switch from the current networking environment and deploy it in a new networking environment.