3com S7906E Installation Instruction

 

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Before configure PoE, make sure that the PoE power supply and PSE is operating normally; 

otherwise, you cannot configure PoE or the configured PoE function does not take effect. 

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Turning off the PoE power supply during the startup of the device might cause the PoE 

configuration in the startup profile invalid. 

 

If the PoE function is not enabled for a PSE, the system does not supply power or reserve power for 

the PSE. 

You are allowed to enable PoE of a PSE if the PSE will not result in PoE power overload; otherwise, 

whether you can enable PoE of the PSE depends on whether the PSE is enabled with the PoE power 

management function (for the detailed description of the PoE power management function, refer to 

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If the PSE is not enabled with the PoE power management function, you are not allowed to enable 

PoE for the PSE. 

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If the PSE is enabled with the PoE power management function, you are allowed to enable PoE 

for the PSE (whether the PSE can supply power depends on other factors, for example, the power 

supply priority of the PSE). 

Follow these steps to enable PoE for a PSE: 

Enter system view 

— 

Enable PoE for the 
PSE 

poe enable pse pse-id 

Required 

Disabled by default. 

 

When the sum of the power consumption of all PSEs exceeds the maximum power of PoE, the system 

considers the PoE is overloaded (The maximum PoE power is decided by the hardware specifications 

of a PoE power supply and the user configuration). 

 

The system does not supply power to or reserve power for the PDs connected to a PoE interface if the 

PoE interface is not enabled with the PoE function. 

You are allowed to enable PoE for a PoE interface if the PoE interface will not result in PoE power 

overload; otherwise, whether you can enable PoE for the PoE interface depends on whether the PoE