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AR Router Troubleshooting Guide

This Product Documentation provides guidance for maintaining AR Enterprise Router, covering common information collection and fault diagnostic commands, typical fault troubleshooting guide, and troubleshooting.
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PSE Cannot Provide Power for a PD

PSE Cannot Provide Power for a PD

This section describes the troubleshooting flowchart and provides a step-by-step troubleshooting procedure for the failure to provide power for a powered device (PD).

Common Causes

This fault is commonly caused by one of the following:

  • The power management mode of the device is manual, but the port is not enabled to provide power for the PD.
  • PoE function is not enabled on the port.
  • The available port power is less than the PD reference power.
  • High PoE power is reserved, so the PoE power supply cannot provide power for PDs.
  • The total power consumption of all the PDs on the device reaches the maximum power configured for PDs.

Troubleshooting Flowchart

After a PD is connected to a port of the AR100&AR120&AR150&AR160&AR200&AR1200&AR2200&AR3200&AR3600 (PSE), the AR100&AR120&AR150&AR160&AR200&AR1200&AR2200&AR3200&AR3600 detects the PD but cannot provide power for the PD.

Figure 14-4 shows the troubleshooting flowchart.

Figure 14-4  Troubleshooting flowchart for the failure to provide power for a PD

Troubleshooting Procedure

NOTE:

Saving the results of each troubleshooting step is recommended. If troubleshooting fails to correct the fault, you will have a record of your actions to provide Huawei technical support personnel.

Procedure

  1. Check the device power management mode.

    NOTE:

    The power management mode can be auto or manual. The default power management mode is auto. In this mode, the PSE automatically provides power for a PD after detecting and classifying the PD. Run the display poe information command to check the power management mode.

    • If the device power management mode is manual, check whether the port is enabled to provide power for the PD.

      Run the display poe power-state slot slot-id command. The PowerOn/Off field in the command output specifies whether the port is enabled to provide power for the PD.

      • If the port is not enabled to provide power for the PD, run the poe power-on interface interface-type interface-number command in the system view to enable this function.

      • If the port is enabled to provide power for the PD, go to step 2.

    • If the power management mode of the device is auto, go to step 2.

  2. Check that the PoE function is enabled on the port.

    Run the display poe power-state slot slot-id command to check whether the PoE function is enabled on the port. If the Enabled field is displayed as enable, the PoE function is enabled.

    • If the PoE function is not enabled, run the poe enable command in the interface view to enable it.

    • If the PoE function is enabled, go to step 3.

  3. Check that the maximum power of the port is greater than the reference power of the PD.

    The system identifies the maximum power of a PD, classifies the PD into a certain level, and defines the reference power of each level. Run the display poe power-state interface interface-type interface-number command to check the maximum power and reference power of the PD.

    • If the maximum power of the port is less than the reference power of the PD, run the undo poe power command in the interface view to restore the default maximum power of the port. Alternatively, run the poe power command to set a value greater than the reference power after restoring the default maximum power.

    • If the maximum power of the port is greater than the reference power of the PD, go to step 4.

  4. Check that the available power of the power supply is greater than the reference power of the PD.

    Certain PoE power may be reserved on the device to meet emergency requirements. By default, 20% PoE Power is reserved. The maximum power for PDs is the total PoE power minus the reserved power.

    Run the display poe-power command to check the PoE information. In the command output, Available power value(mW) specifies the total PoE power in the system, and Reserved power percent specifies the percentage of the reserved power. If 100% of the PoE power is reserved, no power can be provided for PDs.

    Run the display poe information command. In the command output, Power Current Value(mW) specifies the total PoE power consumption in the system.

    • If the total power consumption of all PDs approximates the maximum power configured for PDs, the device cannot provide power for new PDs. To increase the maximum power for PDs, run the poe power-reserved power-reserved command to reduce the reserved power.

    • If the total power consumption of all PDs on the device is less than the maximum power configured for PDs, go to step 5.
  5. Collect the following information and contact technical support personnel:

    • Results of the preceding troubleshooting procedure
    • Configuration file, log file, and alarm file of the AR100&AR120&AR150&AR160&AR200&AR1200&AR2200&AR3200&AR3600

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Updated: 2019-05-10

Document ID: EDOC1000079719

Views: 446751

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