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Cisco Bug: CSCvu20547 - N9K active sup reload due to tempSensor policy trigger even though temp is not high

Last Modified

Oct 16, 2020

Products (65)

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 93600CD-GX Switch
  • Cisco Nexus 3548-X Switch
  • Cisco Nexus 3636C-R Switch
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 3548 Switch
  • Cisco Nexus 92348GC-X Switch
  • Cisco Nexus 92304QC Switch
  • Cisco Nexus 93108TC-FX Switch
  • Cisco Nexus 9396PX Switch
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Known Affected Releases

9.3(4)

Description (partial)

Symptom:
Cisco Nexus 9500 active SUP switchover due to major temperature alarm for the outlet sensor even though temp is not high.

Conditions:
Active SUP switchover was seen because of the major temperature alarm for the outlet sensor (even though temp is not high). The module was power off due to tempSensor policy trigger. Following logs could be seen at the time of issue:

`show logging log`

<snip>

2020 May  1 04:48:46 N9500 %PLATFORM-0-MOD_TEMPMAJALRM: Module-27 reported Major temperature alarm. Sensor=1 Temperature=-10 MajThreshold=75
2020 May  1 04:48:46 N9500 %PLATFORM-2-PFM_MODULE_POWER_OFF_TRIGGER: Power-off Module27  due to tempSensor policy trigger 
2020 May  1 04:48:49 N9500 %SYSMGR-2-HASWITCHOVER_PRE_START: This supervisor is becoming active (pre-start phase).
2020 May  1 04:48:49 N9500 %SYSMGR-2-HASWITCHOVER_START: Supervisor 28 is becoming active.


`show system reset-reason`

----- reset reason for module 27 (from Supervisor in slot 27) ---
1) At 276064 usecs after Fri May  1 04:48:46 2020
    Reason: Policy trigger initiated reset: 
    Service: 
    Version: 9.3(4)
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