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Cisco Bug: CSCvs31019 - switch powered down due to configured fan policy

Last Modified

Jul 17, 2020

Products (12)

  • Cisco Nexus 5000 Series Switches
  • Cisco Nexus 5548P Switch
  • Cisco Nexus 5596UP Switch
  • Cisco Nexus 6004 Switch
  • Cisco Nexus 5624Q Switch
  • Cisco Nexus 6001 Switch
  • Cisco Nexus 5672UP Switch
  • Cisco Nexus 5548UP Switch
  • Cisco Nexus 56128P Switch
  • Cisco Nexus 5696Q Switch
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Known Affected Releases

7.3(5)N1(1)

Description (partial)

Symptom:
Customer switch went down with the following message:

show system reset-reason
----- reset reason for Supervisor-module 1 (from Supervisor in slot 1) ---
1) At 383014 usecs after Mon Nov 18 01:50:11 2019
    Reason: Powered-down due to fan policy trigger
    Service:
    Version: 7.3(5)N1(1)


Leading up to power down where the following log messages:

%$ VDC-1 %$ %KERN-2-SYSTEM_MSG: [4345347.983235] clk_flush: Couldn't Clear Bus, Attempt 1 of 5 - kernel
%$ VDC-1 %$ %KERN-2-SYSTEM_MSG: [4345347.983255] clk_flush: Couldn't Clear Bus, Attempt 2 of 5 - kernel
 %$ VDC-1 %$ %KERN-2-SYSTEM_MSG: [4345347.983275] clk_flush: Couldn't Clear Bus, Attempt 3 of 5 - kernel
 %$ VDC-1 %$ %KERN-2-SYSTEM_MSG: [4345347.983295] clk_flush: Couldn't Clear Bus, Attempt 4 of 5 - kernel
 %$ VDC-1 %$ %KERN-2-SYSTEM_MSG: [4345347.983315] clk_flush: Couldn't Clear Bus, Attempt 5 of 5 - kernel
 %$ VDC-1 %$ %KERN-2-SYSTEM_MSG: [4345347.983325] SMBus failed! (01) - kernel

Conditions:
None
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