3Com 5500G-EI Command Reference Guide - Page 99

PoE Configuration Commands 99 If there are too many ports with critical priority, the total power these ports need might exceed the maximum power supplied by the equipment, i.e., 300W. In this case, no new PD can be added to the switch. When the remaining power of the whole equipment is below 18.8 W, no new PD can be added to the Switch. Example Set the port priority to critical. [SW5500-GigabitEthernet1/0/3]poe priority critical Set Port PSE priority successfully Restore the default priority. [SW5500-GigabitEthernet1/0/3]undo poe priority Set Port PSE priority successfully poe update Syntax poe update { refresh | full } filename View System View Parameter refresh: The refresh update mode is used when the PSE processing software is valid. full: The full update mode is used when the PSE has no valid processing software. filename: Update file name, with a length of 1 to 64 characters. Description Use the poe update command to update the PSE processing software online Note that: z The full mode is used only when you cannot use the refresh mode. z When the update procedure in refresh mode is interrupted for some unexpected reason (e.g. power-off) or some errors occur, you can use the full mode to re-update. z When the PSE processing software is damaged (that is, all the PoE commands cannot be successfully executed), you can use the full mode to update and restore the software.