3850 stack member switch reboot EMP_RELAY: Channel DOWN!

[manohar.yadavs]

Hi All,

Recently a 3850 stack member switch reloaded with the following error logs. I am unable to find any bugs or a conclusive solution for the issue. Any help in this issue is welcome.

Switch is running: Cisco IOS XE Software, Version 16.06.07

Jun 29 10:09:48.361 GMT: %STACKMGR-6-STACK_LINK_CHANGE: Switch 5 R0/0: stack_mgr:  Stack port 2 on Switch 5 is down

Jun 29 10:09:48.357 GMT: %STACKMGR-6-STACK_LINK_CHANGE: Switch 1 R0/0: stack_mgr:  Stack port 1 on Switch 1 is down

Jun 29 10:09:51.078 GMT: %HMANRP-5-CHASSIS_DOWN_EVENT: Chassis 6 gone DOWN!

Jun 29 10:10:43.340 GMT: %HMANRP-6-HMAN_IOS_CHANNEL_INFO: HMAN-IOS channel event for switch 6: EMP_RELAY: Channel DOWN!

Jun 29 10:25:52.375 GMT: %HMANRP-6-HMAN_IOS_CHANNEL_INFO: HMAN-IOS channel event for switch 6: EMP_RELAY: Channel UP!

Jun 29 10:25:52.844 GMT: %HMANRP-6-EMP_NO_ELECTION_INFO: Could not elect active EMP switch, setting emp active switch to 0: EMP_RELAY: Could not elect switch with mgmt port UP

[Leo Laohoo]

Nothing wrong with the log message.

[manohar.yadavs]

Hi Leo,

Thank you for the reply. But the stack member 6 rebooted. Was this the reboot reason. What are these logs actually and what do they suggest?

[marce1000]

 - Reboot reason could be shown by issuing show version on the particular stack member.

  M.

[manohar.yadavs]

------------------ show logging onboard switch 6 uptime detail ------------------

--------------------------------------------------------------------------------
UPTIME SUMMARY INFORMATION
--------------------------------------------------------------------------------
First customer power on : 10/28/2018 05:11:40
Total uptime : 2 years 13 weeks 3 days 4 hours 1 minutes
Total downtime : 0 years 21 weeks 6 days 16 hours 17 minutes
Number of resets : 20
Number of slot changes : 0
Current reset reason : Reload   >>>>>>>>>>>>>>>>> The reason says only "Reload"
Current reset timestamp : 06/29/2021 02:25:15 
Current slot : 255
Chassis type : 0
Current uptime : 0 years 0 weeks 2 days 23 hours 5 minutes

[manohar.yadavs]

There have been frequent reloads of the stack member 6 

=====

05/29/2021 23:25:33 Reload 0 4 0 13 5
06/05/2021 08:06:07 Reload 0 0 6 8 5
06/29/2021 02:25:15 Reload 0 3 2 17 5

[Leo Laohoo]

---

@manohar.yadavs wrote:

But the stack member 6 rebooted.

---

Post the complete output to the following commands: 

sh version
sh log on switch 6 uptime details
dir flash-6:
dir flash-6:core
dir crashinfo-6:

[manohar.yadavs]

Attaching the output of the commands asked.

[Leo Laohoo]

@manohar.yadavs, please follow instructions and do go off making your own. 

I am asking for the following outpout:

sh version
sh log on switch 6 uptime details
dir flash-6:
dir flash-6:core
dir crashinfo-6:

So far, #4 and #6 have not been provided.  And I never asked the output for "crashinfo-6:/tracelogs".