1-7
z In the case that the PSE processing software is damaged (that is, no PoE command can be
executed successfully), use the full update mode to upgrade and thus restore the software.
z The refresh update mode is to upgrade the original processing software in the PSE through
refreshing the software, while the full update mode is to delete the original processing software in
PSE completely and then reload the software.
z Generally, the refresh update mode is used to upgrade the PSE processing software.
z When the online upgrading procedure is interrupted for some unexpected reason (for example, the
device restarts due to some errors), if the upgrade in full mode fails after restart, you must upgrade
in full mode after power-off and restart of the device, and then restart the device manually. In this
way, the former PoE configuration is restored.
Displaying PoE Configuration
After the above configuration, execute the display command in any view to see the operation of the
PoE feature and verify the effect of the configuration.
Table 1-10 Display PoE configuration
Operation Command Description
Display the PoE status of a specific port
or all ports of the switch
display poe interface
[ interface-type interface-number ]
Display the PoE power information of a
specific port or all ports of the switch
display poe interface power
[ interface-type interface-number ]
Display the PSE parameters
display poe powersupply
Display the status (enabled/disabled) of
the PoE over-temperature protection
feature on the switch
display poe
temperature-protection
Available in any
view
PoE Configuration Example
PoE Configuration Example
Networking requirements
Switch A is an Switch 4210 supporting PoE, Switch B can be PoE powered.
z The Ethernet 1/0/1 and Ethernet 1/0/2 ports of Switch A are connected to Switch B and an AP
respectively; the Ethernet 1/0/8 port is intended to be connected with an important AP.
z The PSE processing software of Switch A is first upgraded online. The remotely accessed PDs are
powered by Switch A.
z The power consumption of the accessed AP is 2,500 mW, and the maximum power consumption
of Switch B is 12,000 mW.
z It is required to guarantee the power feeding to the PDs connected to the Ethernet 1/0/8 port even
when Switch A is under full load.
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