topic Re: Association Failure in Wireless

Association Failure

russell.sage — Wed, 13 Aug 2025 13:16:52 GMT

I have users complaining and I am seeing association failures

Failed to associate - auth_mode='wpa2-psk' 11k='1' 11v='1' error_code='30' radio='1' vap='0' channel='104' rssi='40'

I found this link

https://community.cisco.com/t5/wireless-mobility-knowledge-base/802-11-association-status-802-11-deauth-reason-codes/ta-p/3148055/page/2

Which states error-codes 27-31 are reserved and not supported. Has anyone got any more information?

Re: Association Failure

aleabrahao — Wed, 13 Aug 2025 13:20:47 GMT

This is a reserved code in the 802.11 standard, meaning it's not officially defined with a specific cause.

The problem could be due to several reasons, such as a firmware update.

Try the following if you haven't already.

Disable 802.11w on affected SSIDs.
Test with Open SSID to rule out WPA2-PSK issues.
Rollback firmware if the issue started after an upgrade.
Open a Meraki support case with logs if the issue persists.

Re: Association Failure

suarmustafa — Wed, 13 Aug 2025 14:02:29 GMT

You’re correct!
per IEEE 802.11, association status codes 27–31 are reserved and have no standard definition. Vendors can (and do) use them internally for their own reasons, which is why you won’t find a public explanation in the spec.

In your case:

Failed to associate - auth_mode='wpa2-psk' 11k='1' 11v='1' error_code='30' radio='1' vap='0' channel='104' rssi='40'

Code 30 is likely a vendor-specific catch-all for a capability or policy mismatch, often seen with:

Clients that don’t fully support 802.11k/v roaming
DFS channels (e.g. ch.104) where the client doesn’t pass DFS capability checks
Firmware policy blocks before completing RSN authentication

How to narrow it down:

Check client capabilities — verify the device’s 5 GHz support, DFS support, and 11k/11v compatibility. Disable 11k/11v temporarily to see if the problem disappears.
Test on a non-DFS channel (36, 40, 44, 48) to rule out DFS-related association failures.
Check AP firmware/changelog — some vendor firmware releases note fixes for “reserved association code” handling.
Enable verbose client debug logging on the AP/controller to capture the exact step of failure (before/after RSN handshake).
If reproducible with specific client models, check vendor bug databases — reserved codes often show up in known interoperability bugs.

Unfortunately, since it’s a reserved code, the real meaning is implementation-specific and not documented outside of vendor support channels.

Bottom line:
Error code 30 isn’t in the standard; it’s vendor-specific. The only way to get a definitive definition is to check with your Meraki TAC/support, providing them with a wireless packet capture of the failure. They can map code 30 to their internal reason codes.

Re: Association Failure

Philip D'Ath — Wed, 13 Aug 2025 20:39:13 GMT

Has it always been like this, or is it a recent issue?

Have you tried updating the WiFi driver on an affected machine?

Re: Association Failure

aneduzhk — Wed, 13 Aug 2025 21:07:36 GMT

Hi @russell.sage

This is not a bug, but a feature! 🙂 Cisco has partnerships with Intel, Apple, Samsung, and Zebra, which allows us to receive additional information from these client devices including authentication failures, disconnect reasons, etc.)

Error code 30 is generated in cases of a WPA3 authentication error related to a PMF validation problem. We are developing several client analytics and root cause analysis features that leverage this rich information from our partners, and we are continuously improving these features.

Clearly, we still have some work to do to make these error codes easier to understand.

Re: Association Failure

CMR — Thu, 14 Aug 2025 15:28:11 GMT

@russell.sage how is the security of the SSID set? WPA2/PSK or WPA3 personal etc.?

Re: Association Failure

russell.sage — Thu, 14 Aug 2025 16:04:27 GMT

Its set for PSK - I raised a case with Meraki and the error code 30 is related to 802.11w Protected Management Frames. Further investigation identified a single WAP which since reboot the problems haven't been reported.

Re: Association Failure

aneduzhk — Thu, 14 Aug 2025 16:17:20 GMT

Hi @russell.sage PSK with WPA2/WPA3? 🙂 As I mentioned, it should be PMF (802.11w) issue with WPA3. Could you DM the support case?

Re: Association Failure

russell.sage — Fri, 15 Aug 2025 07:17:16 GMT

Cisco Meraki Case 13390694: 802.11 Association Error Code 30