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AP reboots with error "AP stuck in state Channel Select on radio x" with pre-auth enabled

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TitleAP reboots with error "AP stuck in state Channel Select on radio x" with pre-auth enabled
Symptoms
AP reboots with error "AP stuck in state Channel Select on radio x"
 
show_one_alarm()-ALARM 408 CRITICAL(not acked): AccessPoint Rebooting due to: AP stuck in state Channel Select on radio 1
Following error message might also be seen
 
Could not read interface athxx flags: Bad file descriptor


 
Environment
  • ExtremeWireless (identiFi)
  • Firmware 10.41.11
  • 5 Ghz radio (radio 0)
  • 2.4 Ghz radio (radio 1)
Cause
Resolution
Workaround:
  • Disable all forms of pre-auth (OKC, all of the pre-auth types) on all WLAN services used by the AP
Resolution:
  • Issue resolved in firmware 10.41.14 and higher
Additional notes
Release Note: wns0021401 - Improved AP stability during a DFS event with pre-auth configured on the WLAN Service which may cause the device to reboot.

Similar solution with different root cause: AP reboots with error "AP stuck in state Channel Select on radio x" with 11h enabled
 

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