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Cisco Bug: CSCvs26197 - 9120-E: Crash-Reboot: Kernel panic: NMI watchdog: BUG: soft lockup: CPU#3 stuck for 22s!

Last Modified

Jun 30, 2020

Products (1)

  • Cisco Aironet 1850 Series Access Points

Known Affected Releases

8.10(109.22) 8.10(109.9)

Description (partial)

Description: PROBLEM DESCRIPTION: 
====================
Discovered a AP crash in our ENT profile OTA Lab after about ~3hrs of run-time

EXPECTED BEHAVIOR:
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- Zero crashes and/or radio resets

TEST CASE / STEPS TO REPRODUCE:
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- Have an AP9120-E successfully joined to the WLC with 8.10.109.22
- Have ~50 real clients passing a variety of Enterprise traffic: FTP (Get/Put), Multicast, Ping-Sweep, Voice-Video VoIP calls, and etc.
- Then observe the stability of the network/APs

HOW MANY TIMES SEEN/ is it reproducible:
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- 1-time in ~3hrs 

Logs:
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- Attaching AP console log & crash log

Symptom:
9120-E: Crash-Reboot: Kernel panic: NMI watchdog: BUG: soft lockup: CPU#3 stuck for 22s!

Conditions:
AP9120 with 8.10 and above. The crash could be random.
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