airMAX - Station Won't Connect to Access Point


Overview


This article describes possible causes and solutions for when your 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 

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, 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.

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
    • Channel widths (e.g., AP = 40MHz & Station = 40 / 20MHz)
    • Operating frequencies
    • Channel shifting
    • Wireless security

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