stack c3850 reload

[lee-HP]

Hello:

i have a stack of these switches and member 1 started to reload.

I have crashinfo files but there is no support contract for these switches. Can anyone help me analysing it ?

Switch Ports Model SW Version SW Image Mode
------ ----- ----- ---------- ---------- ----
1 32 WS-C3850-24T 16.6.5 CAT3K_CAA-UNIVERSALK9 INSTALL
* 2 32 WS-C3850-24T 16.6.5 CAT3K_CAA-UNIVERSALK9 INSTALL

in show tech file ,i find this :

------------------ show stacks ------------------
Interrupt level stacks:
Level Called Unused/Size Name
2 0 176040/196608 Network Interrupt
3 0 177508/196608 Aux Thread

System was restarted by EHSA standby down

------------------ show logging onboard switch 1 uptime detail ------------------

--------------------------------------------------------------------------------
UPTIME SUMMARY INFORMATION
--------------------------------------------------------------------------------
First customer power on : 05/03/2019 15:49:03
Total uptime : 4 years 18 weeks 3 days 13 hours 0 minutes
Total downtime : 1 years 5 weeks 4 days 2 hours 3 minutes
Number of resets : 11
Number of slot changes : 0
Current reset reason : Critical software exception
Current reset timestamp : 10/08/2024 18:48:10
Current slot : 255
Chassis type : 0
Current uptime : 0 years 1 weeks 1 days 12 hours 4 minutes
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
UPTIME CONTINUOUS INFORMATION
--------------------------------------------------------------------------------
Time Stamp | Reset | Uptime
MM/DD/YYYY HH:MM:SS | Reason | years weeks days hours minutes
--------------------------------------------------------------------------------
05/03/2019 15:49:03 Reload 0 0 0 0 0
05/03/2019 15:59:37 Reload 0 0 0 0 5
05/03/2019 16:11:52 Reload 0 0 0 0 5
05/23/2019 02:56:51 Reload 0 0 0 0 0
05/23/2019 07:38:22 Reload 0 0 0 0 0
08/24/2019 04:06:07 Reload 0 0 0 0 5
05/30/2023 04:14:57 Reload 3 4 3 12 5
05/30/2023 04:21:50 Reload 0 0 0 0 0
07/11/2023 23:07:47 Reload 0 0 0 0 5
07/11/2023 23:48:45 Reload 0 0 0 0 5
07/12/2023 05:22:27 Reload 0 0 0 0 5
10/08/2024 18:48:10 Critical software exception 1 12 5 10 5
--------------------------------------------------------------------------------

------------------ show logging onboard switch 2 uptime detail ------------------

--------------------------------------------------------------------------------
UPTIME SUMMARY INFORMATION
--------------------------------------------------------------------------------
First customer power on : 05/03/2019 15:45:59
Total uptime : 4 years 18 weeks 3 days 12 hours 23 minutes
Total downtime : 1 years 5 weeks 4 days 2 hours 40 minutes
Number of resets : 13
Number of slot changes : 0
Current reset reason : EHSA standby down
Current reset timestamp : 10/08/2024 18:44:52
Current slot : 255
Chassis type : 0
Current uptime : 0 years 1 weeks 1 days 12 hours 5 minutes
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
UPTIME CONTINUOUS INFORMATION
--------------------------------------------------------------------------------
Time Stamp | Reset | Uptime
MM/DD/YYYY HH:MM:SS | Reason | years weeks days hours minutes
--------------------------------------------------------------------------------
05/03/2019 15:45:59 Reload 0 0 0 0 0
05/03/2019 15:54:53 Reload 0 0 0 0 0
05/03/2019 16:07:06 Reload 0 0 0 0 5
05/23/2019 07:51:58 Reload 0 0 0 0 0
05/24/2019 06:41:16 Reload 0 0 0 0 5
08/24/2019 03:41:51 Reload 0 0 0 0 0
05/30/2023 04:39:20 Reload 3 4 3 12 5
05/30/2023 04:53:22 Reload 0 0 0 0 5
07/12/2023 07:07:53 Reload 0 0 0 0 0
07/12/2023 07:49:06 Reload 0 0 0 0 0
07/12/2023 21:23:38 Reload 0 0 0 0 5
07/13/2023 05:39:31 Reload 0 0 0 0 5
10/08/2024 18:37:23 EHSA standby down 1 12 5 9 3
10/08/2024 18:44:52 EHSA standby down 0 0 0 0 0
--------------------------------------------------------------------------------

[Leo Laohoo]

---

@lee-HP wrote:
10/08/2024 18:48:10 Critical software exception
10/08/2024 18:37:23 EHSA standby down

---

The stack was hit with two different bugs. 

"EHSA standby down" is a very "generic" (and vague) excuse when the stackmgr process crashes and takes out the switch member(s).  Crash by "EHSA standby down" only happens in a stack.  "EHSA standby down" will never be a cause of the crash for a stand-alone switch.  

Please post the complete output to the following command: 

dir flash-1:
dir crashinfo-1:/tracelogs | exclude gz

[lee-HP]

before dir crashinfo-1:  output like below:

and i get trace_acrchive file at time 2024

dir flash-1:  i cant get now,maybe next week.

[Leo Laohoo]

The file is corrupt.

[lee-HP]

o , i get it again next week.

have anothe cmd need do or file need get ? i'll do that together next week.

[lee-HP]

hi Leo :

  i get crashinfo and tracelogs files.please help analysis,thinks.

[Leo Laohoo · Accepted solution]

I cannot see anything. 

Two options: 

1.  Make it a point to cold-reboot (remove the power cables for 15 seconds and power up the switch) the stack regularly (yearly); or

2.  Upgrade the firmware to 16.6.10.

[lee-HP]

OK，thanks

[marce1000]

  - You should be able , to use the latest advisory software version , if applicable : because usually what you are seeing is a bug.
     If you can not download software for the platform due to the absence of a support contract , then that could
     be a fatal showstopper for resolving the issue , 

 M.