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Reason switch in switch stack rebooted

Posted on 2011-09-27
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Last Modified: 2012-05-12
One switch in a switch stack rebooted.

What command can I use to find out why?

This is an IOS based switch.

It was not the master that rebooted

The other switches have been up for some time but one of them rebooted last night.
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Question by:Dragon0x40
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rochey2009 earned 500 total points
ID: 36712945
Hi,

You can use the session command to move to each switch and then do a show version to see when the switch reloaded and why.

e.g.

sess 2
show version
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by:Dragon0x40
ID: 36713109
switch #3 rebooted

sw#3 sh ver shows:
 uptime is 15 hours, 4 minutes
System returned to ROM by power-on
System restarted at 22:32:20 PDT Mon Sep 26 2011


sw#3 sh logging shows:
000007: *Sep 26 22:33:11.336 PDT: %SW_VLAN-6-VTP_DOMAIN_NAME_CHG: VTP domain name changed to xxxxx.
000008: *Sep 26 22:33:11.629 PDT: %SYS-5-CONFIG_I: Configured from memory by console
000009: *Sep 26 22:33:11.654 PDT: %STACKMGR-5-SWITCH_READY: Switch 1 is READY
000010: *Sep 26 22:33:12.326 PDT: %STACKMGR-5-MASTER_READY: Master Switch 1 is READY
000011: *Sep 26 22:33:12.359 PDT: %STACKMGR-5-SWITCH_READY: Switch 2 is READY
000012: *Sep 26 22:33:12.669 PDT: %SYS-5-RESTART: System restarted --
Cisco IOS Software
000013: *Sep 26 22:33:12.678 PDT: %STACKMGR-5-SWITCH_READY: Switch 3 is READY


sw#2 show logging shows:

000016: Sep 26 22:30:55.627 PDT: %STACKMGR-4-SWITCH_REMOVED: Switch 3 has been REMOVED from the stack
000017: Sep 26 22:30:55.644 PDT: license_init_config_queue: initializing the license_switch_boot_config_q
000018: Sep 26 22:30:55.661 PDT: %STACKMGR-4-MASTER_ELECTED: Switch 1 has been elected as MASTER of the stack
000019: Sep 26 22:31:12.027 PDT: %STACKMGR-5-MASTER_READY: Master Switch 1 is READY
000020: Sep 26 22:32:56.239 PDT: %STACKMGR-4-SWITCH_ADDED: Switch 3 has been ADDED to the stack
000021: Sep 26 22:33:11.749 PDT: %STACKMGR-5-SWITCH_READY: Switch 3 is READY

I did a show clock on all three switches and the time is synchronized.

Looks like the switch removed from stack and then the vtp domain changed from the console?

Would that have to be local with a console cable?
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by:rochey2009
rochey2009 earned 500 total points
ID: 36713251
"Configured from memory by console" just means that the switch loaded it's configuration.
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