figuring out the cause of a switch reboot?

[baselzind]

i found out that some of my switches restarted in the weekend "3560G-48PS and a WS-C4507R" , i was asked to figure out why they restarted , i checked the temps , cpu and power and "show logging" and everything is okey , so im wondering is it possible to find out the reason of a switch reboot or not , and if so how?

[Leo Laohoo]

so im wondering is it possible to find out the reason of a switch reboot or not , and if so how?

Post the complete output to the following commands: 

1.  sh version; and

2.  dir

[baselzind]

for the first one :

#show version
Cisco IOS Software, Catalyst 4500 L3 Switch Software (cat4500-IPBASEK9-M), Versi on 12.2(50)SG1, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Mon 09-Feb-09 20:40 by prod_rel_team
Image text-base: 0x10000000, data-base: 0x11C294C8

ROM: 12.2(31r)SGA1
Pod Revision 14, Force Revision 31, Tie Revision 32

uptime is 20 hours, 55 minutes
Uptime for this control processor is 20 hours, 55 minutes
System returned to ROM by power-on
System restarted at XXX
System image file is "bootflash:cat4500-ipbasek9-mz.122-50.SG1.bin"

This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to
export@cisco.com.

cisco WS-C4507R (MPC8540) processor (revision 13) with 524288K bytes of memory.
Processor board ID FOX1235G3BC
MPC8540 CPU at 800Mhz, Supervisor V-10GE
Last reset from PowerUp
2 Virtual Ethernet interfaces
104 Gigabit Ethernet interfaces
4 Ten Gigabit Ethernet interfaces
511K bytes of non-volatile configuration memory.

Configuration register is 0x2101

#dir

Directory of bootflash:/

2 -rwx 15728568 Apr 13 2009 09:27:37 +03:00 cat4500-ipbasek9-mz.122-50.SG1.bin

61341696 bytes total (33484992 bytes free)

for the second :

Cisco IOS Software, C3560 Software (C3560-IPBASEK9-M), Version 12.2(55)SE10, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2015 by Cisco Systems, Inc.
Compiled Wed 11-Feb-15 11:34 by prod_rel_team
Image text-base: 0x01000000, data-base: 0x02D00000

ROM: Bootstrap program is C3560 boot loader
BOOTLDR: C3560 Boot Loader (C3560-HBOOT-M) Version 12.2(44)SE5, RELEASE SOFTWARE (fc1)

uptime is 1 day, 20 hours, 27 minutes
System returned to ROM by power-on
System restarted at 
System image file is "flash:c3560-ipbasek9-mz.122-55.SE10.bin"

This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to
export@cisco.com.

cisco WS-C3560G-48PS (PowerPC405) processor (revision F0) with 131072K bytes of memory.

Last reset from power-on
2 Virtual Ethernet interfaces
52 Gigabit Ethernet interfaces

512K bytes of flash-simulated non-volatile configuration memory.
Model revision number : F0
Motherboard revision number : C0
Model number : WS-C3560G-48PS-S
Top Assembly Revision Number : D0
Version ID : V05
CLEI Code Number : CNMWW00ARC
Hardware Board Revision Number : 0x09

Switch Ports Model SW Version SW Image
------ ----- ----- ---------- ----------
* 1 52 WS-C3560G-48PS 12.2(55)SE10 C3560-IPBASEK9-M

Configuration register is 0xF

Directory of flash:/

2 -rwx 3684 Aug 1 2016 11:26:16 +03:00 vlan.dat
3 -rwx 5 Aug 4 2016 15:26:48 +03:00 private-config.text
4 -rwx 11773637 Aug 4 2016 14:58:37 +03:00 c3560-ipbasek9-mz.122-55.SE10.bin
5 -rwx 36434 Aug 4 2016 15:26:48 +03:00 config.text
7 drwx 192 Mar 1 1993 03:08:39 +03:00 c3560-ipbase-mz.122-35.SE5
465 -rwx 1048 Mar 1 1993 03:02:54 +03:00 multiple-fs

32514048 bytes total (11644416 bytes free)

[Leo Laohoo]

Uptime for this control processor is 20 hours, 55 minutes
System returned to ROM by power-on
System restarted at XXX

Possible power outage.

System returned to ROM by power-on
System restarted at 

Possible power outage. 

Contents of the flash is absent of the sub-directory "crashinfo" so I do NOT believe there was a crash.

[baselzind]

yes actually it seems the second one had a power outage but the first one "the 4507" have a UPS connected so it rules out power outage it also have two supervisors modules???

[Leo Laohoo · Accepted solution]

"the 4507" have a UPS connected so it rules out power outage it also have two supervisors modules???

I don't think so.  Look at the uptime of both outputs.  They're just 28 minutes apart.   So maybe there was a power outage but it took too long and the UPS ran out of juice.