z auto: When the switch is close to its full load in supplying power, it will first supply power to the PDsthat are connected to the ports with critical priority, and then supply power to the PDs that areconnected to the ports with high priority. For example: Port A has the priority of critical. When theswitch PoE is close to its full load and a new PD is now added to port A, the switch will power downthe PD connected to the port with the lowest priority and turn to supply power to this new PD. Ifmore than one port has the same lowest priority, the switch will power down the PD connected tothe port with larger port number.z manual: When the switch is close to its full load in supplying power, it will not make change to itsoriginal power supply status based on its priority when a new PD is added. For example: Port A hasthe priority critical. When the switch PoE is close to its full load and a new PD is now added to portA, the switch just gives a prompt that a new PD is added and will not supply power to this new PD.After the PoE feature is enabled on the port, perform the following configuration to set the PoEmanagement mode and PoE priority of a port.Follow these steps to set the PoE management mode and PoE priority of a port:To do… Use the command… RemarksEnter system view system-view —Set the PoE managementmode for the switchpoe power-management{ auto | manual }Requiredauto by default.Enter Ethernet port view interface interface-typeinterface-number —Se the PoE priority of a port poe priority { critical | high |low }Requiredlow by default.Setting the PoE Mode on a PortPoE mode of a port falls into two types, signal mode and spare mode.z Signal mode: DC power is carried over the data pairs (1,2,3,and 6) of category-3/5 twisted pairs.z Spare mode: DC power is carried over the spare pairs (4,5,7,and 8) of category-3/5 twisted pairs.Currently, Switch 4500 does not support the spare mode.After the PoE feature is enabled on the port, perform the following configuration to set the PoE mode ona port.Follow these steps to set the PoE mode on a port:To do… Use the command… RemarksEnter system view system-view —Enter Ethernet port view interface interface-typeinterface-number —Set the PoE mode on the portto signal poe mode signal Optionalsignal by default.49-4
