AP reboot was due to crash

[quang-nv]

Hi team,

We are using the C9105AXI-S AP with the EWC image installed, operating in standalone mode. This is a new AP, but when connected to our current network, it occasionally gets disconnected, and the LED indicator flashes alternately green and red. We checked the logs and found some messages:

%APMGR_TRACE_MESSAGE-3-WLC_AP_LOG_MSG: Chassis 1 R0/0: wncd: AP Remote Log: 6871.6118.ac20 Last AP AP6871.6120.DC34 reboot was due to crash

How can I identify the root cause of this crash? I also tried installing another C9105 AP running EWC, and it encountered the same issue.

Logging file in attachment

Thanks

[Leo Laohoo]

What firmware is the AP on?

[quang-nv]

Hi @Leo Laohoo 

This is firmware:
Cisco IOS XE Software, Version 17.09.06
Cisco IOS Software [Cupertino], C9800-AP Software (C9800-AP-K9_IOSXE-UNIVERSALK9-M), Version 17.9.6, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2024 by Cisco Systems, Inc.
Compiled Wed 11-Sep-24 22:52 by mcpre

[Leo Laohoo]

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@quang-nv wrote:
How can I identify the root cause of this crash?

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A crash will/might leave a crashlog in the flash. 

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@quang-nv wrote:
I also tried installing another C9105 AP running EWC, and it encountered the same issue.

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So this confirms it is a software-related crash.  How about upgrading the firmware to, say, 17.12.5?

[quang-nv]

How can I get the crash files to see what caused the problem?

[Saikat Nandy]

Please refer - https://www.cisco.com/c/en/us/support/docs/switches/catalyst-9200-series-switches/216945-outputs-to-collect-in-the-event-of-crash.pdf (Section -AP-COS Crash)

[molezzz]

maybe the beam-selection config, please use not configured.  

```

%APMGR_TRACE_MESSAGE-3-WLC_GEN_ERR: Chassis 1 R0/0: wncd: Error in  AP has joied RF-tag default-rf-tag - Radio Profile default-radio-profile with beam-selectionwhich is not applicable for this AP
%APMGR_TRACE_MESSAGE-3-WLC_AP_LOG_MSG: Chassis 1 R0/0: wncd: AP Remote Log:  Last AP  reboot was due to crash

```