CHW-3322: Simultaneous L2 watchdog reset on both nodes in an HA pair on FAS90, FAS70, ASA A1K, ASA A90, ASA A70, AFF A1K, AFF A90, AFF A70, or AFF C80

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Category:: ontap-9

Specialty:: hw

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Issue

This issue is applicable to the following platform models: AFF A1K, AFF A90, AFF A70, AFF C80, AFX 1K, ASA A1K, ASA A90, ASA A70, FAS90, FAS70.

Both nodes in one HA pair experience an L2 Watchdog reset at the same time.
BMC events all output on the impacted nodes show the following:

Record 499: Wed Apr 02 23:02:34.264247 2025 [IPMI.notice]: 01aa | 
02 | EVT: 6fc824ff | System_Watchdog | Assertion Event, "Timer 
interrupt"
Record 500: Wed Apr 02 23:02:34.646754 2025 [IPMI Event.critical]: NMI
Record 501: Wed Apr 02 23:02:34.651210 2025 [IPMI.notice]: 01ab | 02 | 
EVT: 6f00ffff | CriticalInt | Assertion Event, "NMI/Diag Interrupt"
Record 502: Wed Apr 02 23:02:35.492102 2025 [IPMI.notice]: 01ac | 02 | 
EVT: 6fc124ff | System_Watchdog | Assertion Event, "Hard reset"
Record 503: Wed Apr 02 23:02:35.624499 2025 [IPMI Event.critical]: L2 watchdog timeout hard reset
Record 504: Wed Apr 02 23:02:35.655394 2025 [IPMI Event.critical]: System reset

The following error can be seen in the EMS log files after the nodes reboot:

[cluster-01:mgr.boot.reason_abnormal:EMERGENCY]: System rebooted due to a watchdog reset.