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Handling L2 Watchdog Resets on the AFF/ASA A800, C800 Platform

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Applies to

  • AFF A800, AFF C800, ASA A800, ASA C800

Issue

  • Node reboots unexpectedly
  • Node does not reboot after an unexpected shutdown

BMC logs on the impacted node show the following: 

[ASUP.notice]: First notification email | (REBOOT (abnormal)) WARNING | Send failed
[IPMI.notice]: 0076 | 02 | EVT: 6fc302ff | System_Watchdog | Assertion Event, "Power cycle"
[IPMI Event.critical]: L2 watchdog timeout power cycle
Or
[IPMI.notice]: 0e1a | 02 | EVT: 6fc824ff | System_Watchdog | Assertion Event, "Timer interrupt"
[IPMI Event.critical]: NMI
[IPMI.notice]: 0e1b | 02 | EVT: 6f00ffff | CriticalInt | Assertion Event, "NMI/Diag Interrupt"
[IPMI.notice]: 0e1c | 02 | EVT: 6fc124ff | System_Watchdog | Assertion Event, "Hard reset"
[IPMI Event.critical]: L2 watchdog timeout hard reset
[IPMI Event.critical]: System reset
[IPMI Event.critical]: L2 watchdog action completed

  • If node reboots, the following errors can be seen in the EMS log files

Thu May 05 15:33:43 +0800 [netapp: splog_main: mgr.boot.reason_abnormal:EMERGENCY]: System rebooted due to a watchdog reset.
Thu May 05 15:33:43 +0800 [netapp: splog_main: callhome.reboot.watchdog:alert]: Call home for REBOOT (watchdog reset)

Thu May 05 15:33:43 +0800 [netapp: cf_hwassist: cf.hwassist.takeoverTrapRecv:notice]: hw_assist: Received takeover hw_assist alert from partner(node), system_down because l2_watchdog_reset.

  • If node is unable to reboot, system senors from the BMC may show the Attn_Sensor1 as Asserted

PCI_SW1_Err      | 0x0        | discrete   | Deasserted | na        | na        | na        | na        
Wrench_Port_Up   | 0x0        | discrete   | Enabled    | na        | na        | na        | na        
SysReset         | 0x0        | discrete   |            | na        | na        | na        | na        
System_Watchdog  | 0x0        | discrete   |            | na        | na        | na        | na        
Attn_Sensor1     | 0x0        | discrete   | Asserted   | na        | na        | na        | na 

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