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Cisco Bug: CSCur09827 - Fan speed alarm is not displayed when it is above the threshold

Last Modified

Mar 05, 2018

Products (9)

  • Cisco Nexus 5000 Series Switches
  • Cisco Nexus 5548P Switch
  • Cisco Nexus 5596UP Switch
  • Cisco Nexus 6004 Switch
  • Cisco Nexus 6001 Switch
  • Cisco Nexus 5020 Switch
  • Cisco Nexus 5548UP Switch
  • Cisco Nexus 5010 Switch
  • Cisco Nexus 5596T Switch

Known Affected Releases

5.1(3)N2(1) 6.0(2)N2(2)

Description (partial)

Symptom:
Fan speed alarm on Nexus5548 is not displayed when it is above the upper threshold, though it is output when it is below the lower threshold:
2014 Sep 17 15:37:38.185 N7K %NOHMS-2-NOHMS_ENV_ERR_FAN_SPEED: System minor alarm in fan tray 1: fan speed is out of range on fan 4. 9450 to 12600 rpm expected. 8612 rpm read

Conditions:
Fan speed is above the upper threshold 12600 rpm as some of the following example:
n5548# sh environment fan detail


Fan:
---------------------------------------------------
Module  Fan  Airflow        Speed(%)  Speed(RPM)
             Direction
---------------------------------------------------
1       1    Front-to-Back  60        15340 <<==
1       2    Front-to-Back  60        11464
1       3    Front-to-Back  60        15384 <<==
1       4    Front-to-Back  60        11587
2       1    Front-to-Back  60        15606 <<==
2       2    Front-to-Back  60        11250
2       3    Front-to-Back  60        15561 <<==
2       4    Front-to-Back  60        11250
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