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New Member

Unexpected exception to CPU vector 1500 on 1812

Hello,

in last days I'm having problems with a Cisco 1812 device.

It works for some time but then crashes and gives the same info:

%Software-forced reload

Preparing to dump core...

04:09:41 CDT Wed Aug 8 2012: Unexpected exception to CPU: vector 1500, PC = 0x800AC87C, LR = 0x800AC87C

-Traceback= 0x800AC87C 0x800AC87C 0x80343920 0x800AE74C 0x800B1D08

CPU Register Context:

MSR = 0x00029220  CR  = 0x42000084  CTR = 0x8001AC70  XER   = 0x20000000

R0  = 0x800AC87C  R1  = 0x838A5828  R2  = 0xFFFB1F58  R3    = 0x00000000

R4  = 0x81764298  R5  = 0x00029220  R6  = 0x82F00000  R7    = 0x82EF0000

R8  = 0x822DB274  R9  = 0x000032DC  R10 = 0x82F03E18  R11   = 0x00000350

R12 = 0x01BCC32C  R13 = 0xFFFB37F4  R14 = 0x80343820  R15   = 0x00000000

R16 = 0x00000000  R17 = 0x00000000  R18 = 0x00000000  R19   = 0x00000000

R20 = 0x00000000  R21 = 0x00000000  R22 = 0x82B80000  R23   = 0x831A0000

R24 = 0x831A0000  R25 = 0x82B80000  R26 = 0x831A0000  R27   = 0x82B80000

R28 = 0x82C40000  R29 = 0x82B60000  R30 = 0x00000003  R31   = 0x00000000

=== Start of Crashinfo Collection (04:09:41 CDT Wed Aug 8 2012) ===

For image:

Cisco IOS Software, C181X Software (C181X-ADVIPSERVICESK9-M), Version 12.4(15)T10, RELEASE SOFTWARE (fc3)

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

Copyright (c) 1986-2009 by Cisco Systems, Inc.

Compiled Mon 14-Sep-09 20:59 by prod_rel_team

Any clue what Unexpected exception to CPU: vector 1500 could be?

Thank you

Everyone's tags (4)
6 REPLIES
Cisco Employee

Unexpected exception to CPU vector 1500 on 1812

Hi Vedran,

I do not know in detail what this error means. Usually, however, these kinds of messages signify a hardware or software problem.

My suggestions (all are blind shots):

  • Check the proper ventilation of the router and make sure it is not overheating.
  • If there are any modules installed into the router, try removing and reseating them. This includes internal modules, RAM, Compact Flash cards, anything that can be removed and plugged back.
  • Try running a different IOS version

Best regards,

Peter

Cisco Employee

Unexpected exception to CPU vector 1500 on 1812

I took a look at the tracebacks, it appears to be memory corruption. That is most likely a software defect. You will need to open a TAC case and supply them with the full crashinfo to determine the exact cause as it requires tools to poke through the memory within the crashinfo to determine the cause of corruption. What you supplied here is simply the registers and stack at the time of the reload. Once they determine the defect they will give you a version of IOS with the fix.

If you don't want to or can't open a case, I would suggest upgrading to the latest version of IOS to see if that resolves the issue as each release of IOS contains many bug fixes and that is an older version of IOS.

Thanks

Anthony

New Member

Unexpected exception to CPU vector 1500 on 1812

Thank you for the replies,

I have tried both options, removed ram cf and tried the latest IOS, erased the configuration with no results, the router reload makes a forced software reload even without any config.

At the end I sent it to the service and they told me that the motherboard is gone, better to buy a new one

Hall of Fame Super Gold

Unexpected exception to CPU vector 1500 on 1812

If you have any WIC cards installed, remove them and try rebooting.

Make sure your CF is not full of crashinfo files.

If all else fails, upgrade the IOS.

New Member

Unexpected exception to CPU vector 1500 on 1812

Hi lealaohoo,

I have erased the config, formatted the cf and put the latest ios

It has no cards, only 2FE and 8 switch ports integrated

Still crashing after some time

Hall of Fame Super Gold

Unexpected exception to CPU vector 1500 on 1812

Contact Cisco TAC.  You may need to RMA the hardware.

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