Cisco 3825 router rebooted

Unanswered Question
Oct 25th, 2009

One of our 3825 (IOS ver 12.4(12)) router rebooted automatically.It is confirmed that there was no power issue/cable disturbance happened at that time but i want 2 know what went wrong...issued sh env all command but no probs found..can anyone guide 2 identify the root cause...


Here is the o/p of sh env all

My_router#sh env all

Redundant Power System is not present.


SYS PS1 is present.

Type: AC


AUX(-48V) PS1 is absent.


Fan 1 Normal

Fan 2 Normal

Fan 3 Normal


Fan Speed is Normal


Alert settings:

Intake temperature warning: Enabled, Threshold: 55

Core temperature warning: Enabled, Threshold: 70 (CPU: 95)


Board Temperature: Normal

Internal-ambient temperature = 29, Normal

CPU temperature = 46, Normal

Intake temperature = 29, Normal


Voltage 1(3300) is Normal, Current voltage = 3316 mV

Voltage 2(5150) is Normal, Current voltage = 5153 mV

Voltage 3(2500) is Normal, Current voltage = 2525 mV

Voltage 4(1200) is Normal, Current voltage = 1215 mV


Nominal frequency



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Paolo Bevilacqua Sun, 10/25/2009 - 14:39

Show ver, show stack, and you will see the software crash.


But, you need a support contract to update the buggy IOS.

Leo Laohoo Sun, 10/25/2009 - 14:48

Check your flash if you can find any "crashinfo" files/sub-directory. If there is one present, can you post it?

edaisal123 Sun, 10/25/2009 - 19:57

Hi All,


I don't see any crashinfo in my flash directory..


My_Router#sh flash:

-#- --length-- -----date/time------ path

1 17594524 Jan 11 2005 09:22:16 +05:30 c3825-advsecurityk9-mz.123-11.T2.bin

2 1541 Jan 11 2005 09:28:58 +05:30 sdmconfig-38xx.cfg

3 3885056 Jan 11 2005 09:29:22 +05:30 sdm.tar

4 1463 Jan 11 2005 09:29:32 +05:30 home.html

5 270848 Jan 11 2005 09:29:46 +05:30 home.tar

6 93095 Jan 11 2005 09:30:00 +05:30 attack-drop.sdf

7 1187840 Jan 11 2005 09:30:16 +05:30 ips.tar

8 36673864 May 21 2007 04:31:48 +05:30 c3825-advipservicesk9-mz.124-12.bin


My_Router#sh stack

Minimum process stacks:

Free/Size Name

5464/6000 Inspect Init Msg

5412/6000 SPAN Subsystem

5140/6000 DIB error message

1928/3000 allegro libretto init

10648/12000 Router Init

2784/12000 Init

59208/60000 script background loader

5256/6000 RADIUS INITCONFIG

2148/3000 Rom Random Update Process

8416/12000 SSH Process


Interrupt level stacks:

Level Called Unused/Size Name

1 115625368 6480/9000 Network interfaces

2 56837878 8592/9000 DMA/Timer Interrupt

3 1 8624/9000 PA Management Int Handler

4 9 8600/9000 Console Uart

5 0 9000/9000 External Interrupt

7 49787295 8560/9000 NMI Interrupt Handler



4161536 bytes available (59723776 bytes used)


My_Router#sh ver

Cisco IOS Software, 3800 Software (C3825-ADVIPSERVICESK9-M), Version 12.4(12), RELEASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2006 by Cisco Systems, Inc.

Compiled Fri 17-Nov-06 15:31 by prod_rel_team


ROM: System Bootstrap, Version 12.3(11r)T1, RELEASE SOFTWARE (fc1)


My_Router uptime is 2 days, 7 hours, 19 minutes

System returned to ROM by power-on

System restarted at 01:07:21 IST Sat Oct 24 2009

System image file is "flash:c3825-advipservicesk9-mz.124-12.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

[email protected].


Cisco 3825 (revision 1.0) with 225280K/36864K bytes of memory.

Processor board ID FHK0903F18Q

2 Gigabit Ethernet interfaces

16 Serial interfaces

6 Channelized E1/PRI ports

2 Channelized T1/PRI ports

1 Virtual Private Network (VPN) Module

DRAM configuration is 64 bits wide with parity enabled.

479K bytes of NVRAM.

62592K bytes of ATA System CompactFlash (Read/Write)


Configuration register is 0x2102


Leo Laohoo Sun, 10/25/2009 - 22:17

System returned to ROM by power-on

System restarted at 01:07:21 IST Sat Oct 24 2009


Doesn't say anything about a crash or something but rather a power failure.

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