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Cisco Bug: CSCuo23668 - N6K: errors "clk_flush: Couldn't Clear Bus" and console unresponsive

Last Modified

Jul 17, 2020

Products (10)

  • Cisco Nexus 6000 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 5696Q Switch
  • Cisco Nexus 56128P Switch

Known Affected Releases

7.0(0)N1(1.1) 7.1(0)N1(1)

Description (partial)

Logs filling up with error: 
%KERN-2-SYSTEM_MSG: [782802.435118] clk_flush: Couldn't Clear Bus, Attempt 1 of 5 - kernel

At the same time, console is unresponsive and system and status LEDs are showing orange.

Observed on a Nexus6004 running 7.0(0)N1(1).
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