Considerations for Setting Power Levels

Review the following considerations when setting power levels:

  • There are two ways to configure the power level for a PoE or PoE+ power-consuming device. The first method is discussed in Configuring Power Levels. The other method is provided in Setting the power class for a PoE power-consuming device. For each PoE port, you can configure either a maximum power level or a power class. You cannot configure both. You can, however, configure a maximum power level on one port and a power class on another port.
  • The RUCKUS PoE or PoE+ device adjusts the power on a port only if there are available power resources. If power resources are not available, the following message is displayed on the console and in the syslog: 
    PoE: Failed power allocation of 30000 mwatts on port 1/1/21. Will retry when more power budget.
  • If the PDs are not supporting LLDP power negotiations and not using PoH devices in any of the PoH ports of any ICX platforms, RUCKUS recommends that you limit the power on those ports using the inline power power-limit command. Limiting power with the inline power power-by-class 4 command does not work for the PoH ports because Class 4 encompasses 30W through 95W. However, Class 4 on units that do not support PoH or High Power remains 30W.
  • RUCKUS devices pre-allocate power as per the configured maximum power for a physically operational PoE- or PoE+-configured port.
Parent topic: Setting the Maximum Power Level for a PoE Power-Consuming Device