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Aruba AP-575 and AP-577s disabled their 5GHz radios

  • 1.  Aruba AP-575 and AP-577s disabled their 5GHz radios

    Posted Oct 23, 2020 02:15 PM

    In the middle of the night I had multiple AP-577s and one AP-575 disable their 5GHz radios. The 2.4GHz radio is not enabled on these access points because the SSID is 5GHz only. Current temperature is 10 degrees Fahrenheit.

     

    The AP-577s are on a virtual controller with 8.7.0.0_75915.

    The AP-575 is on a virtual controller with 8.7.1.0_77203.

     

    Anyone seen this before?

     

    Thank you

     

     



  • 2.  RE: Aruba AP-575 and AP-577s disabled their 5GHz radios

    Posted Oct 26, 2020 07:21 AM

    Could it be that you had DFS radar detects? If the AP detects radar signals on it's channel, it has to shutdown the 5GHz radio and move to a non-DFS channel (if exists) or wait some time for another channel to be clean.

     

    Can you run from the CLI (or maintenance tab in the UI) the 'show ap arm history' command?

    AP303H-1a:68# show ap arm history
    
    Interface :wifi0
    ARM History
    -----------
    Time of Change       Old Channel  New Channel  Old Power  New Power  Reason  Result
    --------------       -----------  -----------  ---------  ---------  ------  ------
    2020-09-24 17:46:53  153-         153-         18         15         P-      Configured
    2020-09-24 17:46:53  124+         153-         18         18         R       -
    2020-09-24 07:32:52  52+          124+         18         18         R       Configured
    2020-09-23 11:17:40  100+         52+          18         18         R       Configured
    2020-09-21 05:28:46  116+         100+         18         18         R       Configured
    2020-09-20 21:15:03  124+         116+         18         18         R       Configured
    2020-09-20 17:18:56  116+         124+         18         18         R       Configured
    2020-09-20 15:03:54  132+         116+         18         18         R       Configured
    2020-09-18 17:51:54  132+         132+         Max        18         P-      Configured
    
    Interface :wifi1
    ARM History
    -----------
    Time of Change       Old Channel  New Channel  Old Power  New Power  Reason  Result
    --------------       -----------  -----------  ---------  ---------  ------  ------
    2020-09-18 17:52:09  1            1            Max        9          P-      Configured
    
    I: Interference, R: Radar detection, N: Noise exceeded, Q: Bad Channel Quality E: Error threshold exceeded, INV: Invalid Channel, G: Rogue AP Containment, M: Empty Channel, P+: Increase Power, P-: Decrease Power, 40INT: 40MHZ intol detected on 2.4G, NO40INT: 40MHz intol cleared on 2.4G, OFF(R): Turn off Radio due to Radar, OFF(MA): Turn off Radio due to Mode Aware, ON: Turn on Radio,  Dynamic Bandwidth Switch, AIRMATCH: AirMatch Event, I*: CCA Interference, C: Radar cleared, NC: Noise Cleared, Random: Random Channel, RMC: Radio Mode Change, RCP: Radio Client Preference Change

    From there you should be able to see what happened to the radio settings, and may see the why of it. Note that the 5GHz radio is radio 0. You can see a few radar detects in my example above (flag: R).

     

    Grabbing a 'show tech-support' from the AP as soon as you detect the issue, and a second time as you find the recovery would help as well. It contains all relevant logs. The 'show log wireless' and/or 'show log system' should contain information on what happened as well.



  • 3.  RE: Aruba AP-575 and AP-577s disabled their 5GHz radios

    Posted Oct 26, 2020 11:32 AM

    Noticed this under the show log driver section of the show tech-support command.

     

    [248228.313296] PMM: thermal overheat! shutdown
    [248238.329295] PMM: thermal overheat! shutdown
    [248248.345291] PMM: thermal overheat! shutdown
    [248258.361295] PMM: thermal overheat! shutdown
    [248268.377293] PMM: thermal overheat! shutdown
    [248278.393294] PMM: thermal overheat! shutdown
    [248288.409293] PMM: thermal overheat! shutdown
    [248298.425291] PMM: thermal overheat! shutdown
    [248308.441293] PMM: thermal overheat! shutdown
    [248318.457292] PMM: thermal overheat! shutdown
    [248328.473293] PMM: thermal overheat! shutdown

     

     



  • 4.  RE: Aruba AP-575 and AP-577s disabled their 5GHz radios

    Posted 29 days ago
    Please reach out to Aruba support.It does not really make sense to have thermal overheat if the AP is below the freezing point.

    ------------------------------
    Herman Robers
    ------------------------
    If you have urgent issues, always contact your Aruba partner, distributor or Aruba TAC Support. Check https://www.arubanetworks.com/support-services/contact-support/ for how to contact Aruba TAC.
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