3com 5500-ei pwr Guía De Referencia

 

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Use the poe priority command to configure the PoE priority of a port.  

Use the undo poe priority command to restore the default PoE priority. 

By default, the PoE priority of a port is low. 

When the available power of the PSE is too small, the PoE priority and the PoE management mode are 

used together to determine how to allocate PoE power for the new PDs.  

1)  When the manual PoE management mode is adopted: 

The switch will not supply power to the new PDs if the available power of the PSE is less than 18.8 W. 

2)  When the auto PoE management mode is adopted: 

z 

If a PD is plugged into the port with a higher priority when the available power of the PSE is less 

than 18.8 W, the power supply to the port with the biggest number in the port group with the lowest 

priority is turned off, so that a part of power is released for the new PD. 

z 

If the available power of the whole switch is less than 18.8 W and there is no port with low priority, 

the port with the inserted PD cannot supply power. 

# Set the PoE priority of Ethernet 1/0/3 to critical. 

<Sysname> system-view 

System View: return to User View with Ctrl+Z. 

[Sysname] interface Ethernet 1/0/3 

[Sysname-Ethernet1/0/3] poe priority critical 

System view 

None 

Use the poe temperature-protection enable command to enable PoE over-temperature protection on 

the switch. 

Use the undo poe temperature-protection enable command to disable PoE over-temperature 

protection on the switch. 

The PoE over-temperature protection operates as follows: 

The switch disables the PoE feature on all ports when its internal temperature exceeds 65°C (149°F) for 

self-protect, and restores the PoE feature settings on all its ports when the temperature drops below 

60°C (140°F). 

By default, PoE over-temperature protection is enabled on the switch.