No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

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.
Rate and give feedback :
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
A STA Fails to Discover Radio Signals

A STA Fails to Discover Radio Signals

Common Causes

This fault is commonly caused by one of the following:

  • Wireless service is not enabled on the STA.
  • The wireless network adapter on the STA is faulty.
  • No antenna is installed on the AP.
  • The AP is faulty.
  • No VAP is created on the device.
  • SSID hiding is enabled for the VAP.
  • The radio interface is disabled on the AP.
  • A low radio signal power is set for the AP on the device.

Troubleshooting Flowchart

Figure 27-1 shows the troubleshooting flowchart.
Figure 27-1  STA fails to discover radio signals

Troubleshooting Procedure

NOTE:

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

Procedure

  1. Check whether wireless service is enabled on the STA.

    • If wireless service is not enabled, enable it.
    • If wireless service is enabled, go to step 2.

  2. Check whether the wireless network adapter on the STA is working properly.

    1. Upgrade the wireless network adapter driver to check whether the STA can detect signals.

      • If the STA can detect signals, the old driver is faulty. Upgrade the driver.
      • If the STA cannot detect signals, go to step b.
    2. Use another wireless network adapter to check whether radio signals can be discovered.

      • If radio signals can be discovered, the wireless network adapter on the original STA is faulty. Replace it with a new wireless network adapter.
      • If a radio signal cannot be discovered, go to step 3.

  3. Check whether an antenna is installed on the AP.

    • If no antenna is installed, install an antenna on the AP.
    • If an antenna is installed, go to step 4.

  4. Check whether the AP is working properly.

    Run the display ap command on the device and check the State field.

    • If the State field is displayed as fault, the AP is faulty. Restart the AP manually.
      • If the AP cannot transition to the normal state after it is reboot, restart the device. If the AP still cannot transition to the normal state, go to step 9.
      • If the AP transitions to the normal state after it is reboot, go to step 5.
    • If the State field is displayed as normal, the AP is working properly. Go to step 5.

  5. Check whether a VAP is created on the device.

    Run the display vap command on the device to check whether a VAP is created.

    • If Error:VAP does not exist is displayed, no VAP is created. Run the service-set { name service-set-name | id service-set-id } [ wlan wlan-id ] command to bind a service set to a specified radio to create a VAP.
    • If VAP information is displayed, a VAP has been created. Go to step 6.

  6. Check whether SSID hiding is disabled in the VAP.

    Run the display service-set { all | id service-set-id | name service-set-name | ssid ssid } command on the device to check whether SSID hiding is enabled in the VAP.

    • If the Hide SSID field is displayed as enable, SSID hiding has been enabled for the VAP. Run the undo ssid-hide command in the service set view to disable SSID hiding.
    • If the Hide SSID field is displayed as disable, SSID hiding is disabled for the VAP. Go to step 7.

  7. Check whether the radio interface is enabled on the AP.

    Run the display radio config ap-id ap-id radio-id radio-id command on the device to check the radio interface status.

    • If the Administrate status field is displayed as disable, the radio interface is disabled. Run the radio enable command to enable the radio interface.
    • If the Administrate status field is displayed as enable, the radio interface has been enabled. Go to step 8.

  8. Check the radio signal power configured for the AP on the device.

    Run the display actual channel-power ap-id ap-id radio-id radio-id command on the device to check the channel and power parameters of the specified radio.

    NOTE:

    The POWER-LEVEL field specifies the current transmit power level of a radio. The value of this field ranges from 0 to 15. Level 0 indicates the maximum power. Level 1 is 1 dBm less than level 0; level 2 is 2 dBm less than level 0; and so on. A higher power level indicates a lower power. When the transmit power level is set to 12, 13, 14, or 15, the POWER-LEVEL field is always displayed as 12.

    • If the POWER-LEVEL field is displayed as 12 or a value near 12, the STA is unable to discover radio signals because the current transmit power of the radio is too low. Run the power-level power-level command in the Radio view to set a higher transmit power level for the radio.
    • If the POWER-LEVEL field is displayed as 0 or a value near 0, the current transmit power of the radio is within the specified range. Go to step 9.

  9. Collect the following information and contact technical support personnel:

    • Results of the preceding troubleshooting procedure
    • Configuration files, log files, and alarm files of the device

Translation
Download
Updated: 2019-05-10

Document ID: EDOC1000079719

Views: 448286

Downloads: 4305

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Share
Previous Next