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Cisco Bug: CSCvv84849 - Nexus N9K experience a Crash due to Fatal Module Error by TAHUSD

Last Modified

Sep 29, 2020

Products (1)

  • Cisco Nexus 9000 Series Switches

Known Affected Releases

7.0(3)I7(8)

Description (partial)

Symptom:
Nexus N9K may experience a software crash due to Fatal Module Error. This can be seen either in "show version" or "show system reset-reason".

Last reset at 391642 usecs after Mon Aug 31 05:41:11 2020
  Reason: Reset Requested due to Fatal Module Error
  System version: 7.0(3)I7(8)
  Service: System manager


A Tahusd core is available:

NexusN9K# show cores

VDC  Module  Instance  Process-name     PID       Date(Year-Month-Day Time)
---  ------  --------  ---------------  --------  -------------------------
1    1       1         tahusd           31645     2020-08-31 05:43:09


`show logging onboard internal reset-reason`
----------------------------
    Module:  1
----------------------------
	Last log in OBFL was written at time Thu Sep  3 01:52:27 2020

Reset Reason for this card:
	Image Version : 7.0(3)I7(8)
	Reset Reason (LCM): Unknown (0) at time Mon Aug 31 05:43:50 2020
	Reset Reason (SW): Reset Requested due to Fatal Module Error (4) at time Mon Aug 31 05:41:11 2020
	  Service (Additional Info): System manager
	Reset Reason (HW): Watchdog Reset (32) at time Mon Aug 31 05:43:50 2020
	Last log in OBFL was written at time Mon Aug 31 05:04:20 2020



`show logging onboard internal platform`
----------------------------
    Module:  1
----------------------------

Mon Aug 31 05:41:11 2020 (380236 us) 
Critical failure due to Service on linecard had a hap-reset in device 134
 (device error code: 0x0, extra info: tahusd hap reset)

Conditions:
N9K experience a software reload and tahusd core is available.
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