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CONTAP-244031: SwitchFanNotPresent_Alert reported After Ontap upgrade to 9.13.1

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Issue

You will see these health alerts after upgrading to 9.13.1:

"hm.alert.raised: Alert Id = SwitchFanNotPresent_Alert , Alerting Resource = ClusterSwitch(FOCXXXX)/Fan Module-4"
"hm.alert.raised: Alert Id = SwitchFanNotPresent_Alert , Alerting Resource = ClusterSwitch(FOCXXXX)/Fan Module-3"
"hm.alert.raised: Alert Id = SwitchFanNotPresent_Alert , Alerting Resource = ClusterSwitch(FOCXXXX)/Fan Module-2"
"hm.alert.raised: Alert Id = SwitchFanNotPresent_Alert , Alerting Resource = ClusterSwitch(FOCXXXX)/Fan Module-1"


The issue has only been reported on  Cisco NX3132 switches. When you look at the switches you will see no errors reported.


You can check the fan health with the "show environment fan detail" command on the Nexus switch.

Example:
Switch>enable
Switch#show environment fan detail
Fan:
---------------------------------------------------------------------------

Fan             Model                Hw     Direction       Status
---------------------------------------------------------------------------

Fan1(sys_fan1)  NXA-FAN-30CFM-F      0.0    front-to-back   Ok 
Fan2(sys_fan2)  NXA-FAN-30CFM-F      0.0    front-to-back   Ok 
Fan3(sys_fan3)  NXA-FAN-30CFM-F      0.0    front-to-back   Ok 
Fan4(sys_fan4)  NXA-FAN-30CFM-F      0.0    front-to-back   Ok 
Fan_in_PS1      N2200-PAC-400W       --     front-to-back   Ok
Fan_in_PS2      N2200-PAC-400W       --     front-to-back   Ok

Fan Zone Speed: Zone 1: 0x32

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