Operation Manual – PoE-PoE ProfileH3C S5100-SI/EI Series Ethernet Switches Chapter 1 PoE Configuration1-5z auto: When the switch is close to its full load in supplying power, it will first supplypower to the PDs that are connected to the ports with critical priority, and thensupply power to the PDs that are connected to the ports with high priority. Forexample: Port A has the priority of critical. When the switch PoE is close to its fullload and a new PD is now added to port A, the switch will power down the PDconnected to the port with the lowest priority and turn to supply power to this newPD. If more than one port has the same lowest priority, the switch will power downthe PD connected to the port with larger port number.z manual: When the switch is close to its full load in supplying power, it will notmake change to its original power supply status based on its priority when a newPD is added. For example: Port A has the priority critical. When the switch PoE isclose to its full load and a new PD is now added to port A, the switch just gives aprompt 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 setthe PoE management mode and PoE priority of a port.Table 1-6 Set the PoE management mode and PoE priority of a portOperation Command DescriptionEnter 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 aportpoe priority { critical |high | low }Requiredlow by default.1.2.5 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 (1,2,3,6) of category-3/5twisted pairs.z Spare mode: DC power is carried over the spare pairs (4,5,7,8) of category-3/5twisted pairs.Currently, S5100-SI/EI series Ethernet switches do not support the spare mode.After the PoE feature is enabled on the port, perform the following configuration to setthe PoE mode on a port.
