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Cisco Bug: CSCvu39195 - Heartbeat failure on process VNTAGC may cause a linecard crash

Last Modified

Sep 30, 2020

Products (9)

  • Cisco Nexus 7000 Series Switches
  • Cisco Nexus 7000 10-Slot Switch
  • Cisco Nexus 7000 4-Slot Switch
  • Cisco Nexus 7700 6-Slot Switch
  • Cisco Nexus 7700 18-Slot Switch
  • Cisco Nexus 7000 18-Slot Switch
  • Cisco Nexus 7700 10-Slot Switch
  • Cisco Nexus 7000 9-Slot Switch
  • Cisco Nexus 7700 2-Slot Switch

Known Affected Releases


Description (partial)

A nexus line card may crash due to hearbeat failure while communicating on process vntagc. You may see "vntagc hap reset" in the output of 'show system reset-reason module x'. Look for the 'Reset reason'

where x is the module that crashed and rebooted

*************** module reset reason (2) *************
Time stamp   : At 457404 usecs after Tue May 19 17:32:36 2020

Service name : System manager
Reset reason : vntagc hap reset => [Failures < MAX] : powercycle. <<<<<<<
Serial number: JAE205206FN
Error code   : 1075708042

----- reset reason for module 2 (from Supervisor in slot 5) ---
1) At 956124 usecs after Tue May 19 17:32:41 2020
    Reason: Reset Requested due to Fatal Module Error
    Service: System manager
    Version: 8.2(1)

Nexus 7k with a N77-M348XP-23L line card
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