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airMAX - Station Won't Connect to Access Point

Overview

This article describes possible causes and solutions for when a station won't connect to an airMAX access point.   

Possible causes / recommended actions

  1. Compatibility Between Radios
  2. Compatibility Between airMAX AC and an airMAX M Device
  3. Compatibility Between a Legacy Station and an airMAX M Access Point
  4. Compatibility Between Non-Ubiquiti Radios and an airMAX M Access Point
  5. Misconfiguration on Access Point or Station
  6. Related Articles

Compatibility Between Radios

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Frequency: Radios must use the same frequency range. As an example, M5 and M2 products are not compatible.

airMAX Protocol: Any airMAX access point (AP) with the airMAX protocol active will not allow connections from stations that are not airMAX-ready. To connect non-airMAX clients, you would have to disable the airMAX protocol on the AP. Note that disabling airMAX is not recommended since airMAX provides the best possible performance in outdoor wireless networks, so do so only if there is no other solution.

airMAX-AC: airMAX M devices are only able to connect to airMAX AC Access Points. But AC devices cannot connect to an M device as an access point. See airMAX - How to Connect airMAX M Stations to an airMAX AC Access Point.

Compatibility Between airMAX AC and an airMAX M Device

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  1. Make sure your airMAX AC AP is upgraded to the current stable firmware.
  2. Upgrade all airMAX M clients to the current stable firmware.

Compatibility Between a Legacy Station and an airMAX M Access Point

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  1. Upgrade the Legacy station to version 4.x. Find downloads here.
  2. Upgrade airMAX M AP version 6.x.
  3. Now Legacy radios can connect to airMAX M APs with airMAX enabled.
  4. Navigate to the airMAX M AP's GUI.
  5. Make sure that airSelect is not enabled.

Compatibility Between Non-Ubiquiti Radios and an airMAX M Access Point

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  1. Navigate to the airMAX AP's GUI.
  2. Navigate to the airMAX tab.
  3. Disable airMAX protocol on airMAX.
  4. Click "Change" then "Apply."
  5. Now the airMAX M AP will use the 802.11 CSMA / CA protocol to work with other stations.
  6. Navigate to the Wireless page and ensure that "Channel Shifting" is disabled.

Misconfiguration on Access Point or Station 

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  1. Navigate to the Wireless pages of both AP and Station.
  2. Check that wireless settings match on AP and Station, including:
    • SSID
    • Wireless Security
        As of firmware versions 6.1.9 on M series and 8.5.11 on AC series, default security is WPA2-AES with the password `0000:0000`.
    • Channel widths (e.g., AP = 40MHz & Station = 40 / 20MHz)
    • Operating frequencies
    • Channel shifting

Related Articles

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airMAX - Troubleshooting an Inaccessible Device

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