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CONTAP-119131: False-positive switch fan and power alerts when SNMP failures occur

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Issue

  • The switch health monitor alerts SwitchFanNotPresent_Alert, SwitchPowerNotPresent_Alert, and SwitchPowerUnknown_Alert are seen repeatedly being raised and cleared.
  • All three alerts must be raised for this issue to apply
  • Affects the following switch models:
  • BES-53248
  • N9K-C9336C-FX2
  • N9K-C92300YC
  • MSN2100-CB2FC, MSN2100-CB2RC
  • X190006-PE, X190006-PI
  • Event logs report multiple alerts, such as:
    hm.alert.raised: Alert Id = SwitchPowerUnknown_Alert , Alerting Resource = Switch1(Serial)/PowerSupply-1 raised by monitor ethernet-switch
    hm.alert.raised: Alert Id = SwitchPowerNotPresent_Alert , Alerting Resource = Switch1(Serial)/PowerSupply-1 raised by monitor ethernet-switch
    hm.alert.raised: Alert Id = SwitchFanNotPresent_Alert , Alerting Resource = Switch1(Serial)/Fan Module-1 raised by monitor ethernet-switch
  • The "system health alert show" command output also show these alerts

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