Power management 157Note: A screw connects the ground wire, and a star washer is on thebase of the Nortel Ethernet Routing Switch 4548GT-PWR.External power source connected to back of the Nortel Ethernet Routing Switch 4548GT-PWRPower managementThe Nortel Ethernet Routing Switch 4548GT-PWR and the 4550T-PWR useseveral device-management systems, such as the Web-based ManagementInterface, the CLI, and Device Manager (DM), as well as Enterprise fornetwork-level management services.By using the CLI, Web, or DM, you can configure the level of power tospecific ports, and enable or disable power to each port. You can set themaximum power level for each port by increments of 1 W—in the range of 3W to 16 W. The default power level for each port is 16 W.You can configure the power priority of each port by choosing low, high, orcritical power priority settings. The switch automatically drops low-priorityports when the power requirements exceed the available power budget. Ifthe power requirements are lower than the switch power budget, the powerreturns to the dropped port.For example, assume the following scenario:• ports 1 to 40 are configured as low priority• port 41 is configured as high priority• ports 1 to 40 are connected to powered devices• devices on ports are consuming all the available switch powerNortel Ethernet Routing Switch 4500 SeriesOverview — System ConfigurationNN47205-500 02.01 Standard5.0 23 February 2007Copyright © 2007, Nortel Networks Nortel Networks Confidential.
