74 CHAPTER 4: P OWER OVER ETHERNET CONFIGURATION■ When using the PWR switches to supply power to remote PDs, the PDs neednot have any external power supply.■ If a remote PD has an external power supply, the PWR switches and theexternal power supply will be redundant with each other for the PD.■ Only the electrical ports of the PWR switches support the PoE feature.PoE Configuration The PWR switches can automatically detect any device that needs remote powersupply through the port to which it connects and feeds power to this device.You can use the command line to enable/disable the PoE feature of a port, set thepower supply priority, maximum output power, and compatibility detect functionof a port.PoE configuration tasks are listed in the following table.Enabling/Disabling thePoE Feature on a PortYou can use the following command to enable/disable the PoE feature on a port inaccordance with the network requirement.Perform the following configuration in Ethernet Port View.Table 67 Enabling/disabling PoE feature on a portBy default, the PoE feature of each port is enabled.Table 66 PoE ConfigurationDevice Configuration Default DescriptionSwitch 4500 26Port PWR / Switch4500 50 PortPWREnabling/Disabling PoE on aportDisableSetting the maximum outputpower on a port15400 mWSetting the PoE managementmode on a port used in thecase of power overloadingAutoSetting the port priority LowSetting the PoE mode on a port Signal line Switch 4500 supportssignal mode onlySetting the compatibility detectfunction on a portCloseUpgrading the PSE processingsoftware onlineOnline downloading ofupgrade file is neededPD Correctly connecting a PD withan electrical port on the PWRswitchesOperation CommandEnable the PoE feature on a port poe enableDisable the PoE feature on a port undo poe enable
