Have you configured a max number of clients per SSID? Looks like that's set to 65535 (or not set and maybe defaulting to that value).
You configure the client limit per SSID (Advanced Configuration Mode) under the virtual-ap profile for your SSID, then under SSID there is a setting 'Max Associations'. The default setting as far as I know is 64. The messages you see may be 'harmless', and it's not clear to me if you experience problems or just see these messages.
If you experience (connectivity) issues, it may be best to reach out to your partner or TAC and troubleshoot from the symptoms you see instead of chasing log messages that may or may not be related.
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Herman Robers
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If you have urgent issues, always contact your HPE Aruba Networking partner, distributor, or Aruba TAC Support. Check
https://www.arubanetworks.com/support-services/contact-support/ for how to contact HPE Aruba Networking TAC. Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or HPE Aruba Networking.
In case your problem is solved, please invest the time to post a follow-up with the information on how you solved it. Others can benefit from that.
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Original Message:
Sent: Jul 14, 2025 07:13 AM
From: alexb
Subject: 'Max Clients too big' controller log warning
We are running 8.12.0.0-FIPS.
The crashes are all AP related.
Original Message:
Sent: Jul 11, 2025 07:59 PM
From: ariyap
Subject: 'Max Clients too big' controller log warning
what firmware version is running on the controller? it also seems there is crash dump on this controller. you can check that too.
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If my post was useful accept solution and/or give kudos.
Any opinions expressed here are solely my own and not necessarily that of HPE or Aruba.
Original Message:
Sent: Jul 11, 2025 10:28 AM
From: alexb
Subject: 'Max Clients too big' controller log warning
Hello all,
Has anyone seen this error in their controller log:
(wcFIDF2) *#show log all | include 'max_cl'
Jul 9 15:54:31 2025 stm[3757]: <400169> <5525> <WARN> |stm| AP - 68:28:cf:db:0f:50, max_clients 65535 too big
Jul 9 15:54:31 2025 stm[3757]: <400169> <5525> <WARN> |stm| AP - 68:28:cf:db:0f:60, max_clients 65535 too big
Jul 9 15:54:32 2025 stm[3757]: <400169> <5525> <WARN> |stm| AP - 50:e4:e0:55:3d:f0, max_clients 65535 too big
Jul 9 15:54:32 2025 stm[3757]: <400169> <5525> <WARN> |stm| AP - 50:e4:e0:55:3d:e0, max_clients 65535 too big
Jul 9 15:55:04 2025 stm[3757]: <400169> <3757> <WARN> |stm| AP - 68:28:cf:cd:b7:a0, max_clients 65535 too big
Jul 9 15:55:04 2025 stm[3757]: <400169> <3757> <WARN> |stm| AP - 68:28:cf:cd:7b:a0, max_clients 65535 too big
Jul 9 15:55:04 2025 stm[3757]: <400169> <3757> <WARN> |stm| AP - 60:26:ef:f4:9e:b0, max_clients 65535 too big
Jul 9 15:55:05 2025 stm[3757]: <400169> <5525> <WARN> |stm| AP - 68:28:cf:cd:7b:a0, max_clients 65535 too big
Jul 9 15:55:05 2025 stm[3757]: <400169> <5525> <WARN> |stm| AP - 60:26:ef:f4:9e:b0, max_clients 65535 too big
Jul 9 15:55:54 2025 stm[3757]: <400169> <5525> <WARN> |stm| AP - 44:12:44:63:bf:20, max_clients 65535 too big
Jul 9 15:56:04 2025 stm[3757]: <400169> <5525> <WARN> |stm| AP - 68:28:cf:cd:6c:a0, max_clients 65535 too big
Jul 9 15:56:04 2025 stm[3757]: <400169> <3757> <WARN> |stm| AP - 68:28:cf:cc:64:a0, max_clients 65535 too big
Jul 9 15:56:04 2025 stm[3757]: <400169> <3757> <WARN> |stm| AP - 68:28:cf:cc:64:b0, max_clients 65535 too big
Jul 9 15:57:04 2025 stm[3757]: <400169> <5525> <WARN> |stm| AP - 68:28:cf:ad:e5:80, max_clients 65535 too big
Jul 9 15:57:04 2025 stm[3757]: <400169> <5525> <WARN> |stm| AP - 68:28:cf:ad:e5:90, max_clients 65535 too big
Thanks,
Alex