Bus error due to which router get Rebooted

Manish Prasad · ‎10-21-2009

Hello Netpros,

Need a help to solve out one problem regarding the Bus error in 7206VXR due to which router got rebooted.

Error Log

================

System returned to ROM by bus error at PC 0x32313300, address 0x0 at 03:42:22 GMT Thu Oct 22 2009

System restarted at 03:45:31 GMT Thu Oct 22 2009

===============

Cisco 7206VXR (NPE-G1) processor (revision C) with 491520K/32768K bytes of memory.

Is it required to upgrade the IOS to solve this issue?

Thanks in Advance.

Manish Prasad

Giuseppe Larosa · ‎10-22-2009

Hello Manish,

the bus error can be the sign of a SW bug or a real bus error case that occurred on your device.

Only in first case an IOS upgrade may help.

To understand what is your case you should post

sh ver

sh stack

into error message decoder tool or here in the forum as attachment files.

see

http://www.cisco.com/en/US/products/sw/iosswrel/ps1831/products_tech_note09186a00800cdd51.shtml

Hope to help

Giuseppe

Manish Prasad · ‎10-22-2009

As required the details are attached.

Router_12#sh ver

Cisco IOS Software, 7200 Software (C7200-ADVENTERPRISEK9-M), Version 12.4(22)T, RELEASE SOFTWARE (fc1)

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

Compiled Fri 10-Oct-08 10:10 by prod_rel_team

ROM: System Bootstrap, Version 12.3(4r)T3, RELEASE SOFTWARE (fc1)

BOOTLDR: Cisco IOS Software, 7200 Software (C7200-KBOOT-M), Version 12.4(12), RELEASE SOFTWARE (fc1)

SP_Union_2 uptime is 6 hours, 9 minutes

System returned to ROM by bus error at PC 0x32313300, address 0x0 at 03:42:22 GMT Thu Oct 22 2009

System restarted at 03:45:31 GMT Thu Oct 22 2009

System image file is "disk2:c7200-adventerprisek9-mz.124-22.T.bin"

Cisco 7206VXR (NPE-G1) processor (revision C) with 491520K/32768K bytes of memory.

Processor board ID 36402628

SB-1 CPU at 700MHz, Implementation 1025, Rev 0.2, 512KB L2 Cache

6 slot VXR midplane, Version 2.11

Last reset from power-on

PCI bus mb1 (Slots 1, 3 and 5) has a capacity of 600 bandwidth points.

Current configuration on bus mb1 has a total of 300 bandwidth points.

This configuration is within the PCI bus capacity and is supported.

PCI bus mb2 (Slots 2, 4 and 6) has a capacity of 600 bandwidth points.

Current configuration on bus mb2 has a total of 0 bandwidth points.

This configuration is within the PCI bus capacity and is supported.

Please refer to the following document "Cisco 7200 Series Port Adaptor

Hardware Configuration Guidelines" on Cisco.com <http://www.cisco.com>

for c7200 bandwidth points oversubscription and usage guidelines.

62720K bytes of ATA PCMCIA card at slot 2 (Sector size 512 bytes).

16384K bytes of Flash internal SIMM (Sector size 256K).

Configuration register is 0x2102

----------------------------------------

Router_12#sh stack

Minimum process stacks:

Free/Size Name

5440/6000 Inspect Init Msg

59204/60000 script background loader

58920/60000 EEM Auto Registration Proc

5440/6000 SASL MAIN

2436/3000 allegro libretto init

10576/12000 Router Init

4216/6000 Update prst

3380/12000 Init

4244/6000 DIB error message

5228/6000 RADIUS INITCONFIG

10176/12000 Exec

2288/3000 Rom Random Update Process

11360/12000 IPRM

5356/6000 URPF stats

6288/12000 SSH Process

Interrupt level stacks:

Level Called Unused/Size Name

1 3446810 6748/9000 Network interfaces

2 0 9000/9000 DMA/Timer Interrupt

3 193 7788/9000 PA Management Int Handler

Interrupt level stacks:

Level Called Unused/Size Name

4 6234 8596/9000 Console Uart

5 0 9000/9000 OIR/Error Interrupt

7 5548643 8572/9000 NMI Interrupt Handler

System was restarted by bus error at PC 0x32313300, address 0x0 at 03:42:22 GMT Thu Oct 22 2009

7200 Software (C7200-ADVENTERPRISEK9-M), Version 12.4(22)T, RELEASE SOFTWARE (fc1)

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

Compiled Fri 10-Oct-08 10:10 by prod_rel_team

Image text-base: 0x600089D4, data-base: 0x63B9C320

Stack trace from system failure:

FP: 0x67FDAED8, RA: 0x32313300

Thanks You

Manish

Giuseppe Larosa · ‎10-22-2009

Hello Manish,

the feedback from output interpreter is:

ERROR: This router was last restarted by a bus error:

'bus error at PC 0x32313300, address 0x0 at 03:42:22 GMT Thu Oct 22 2009'

The system encounters a bus error when the processor tries to access a memory location

that either does not exist (a software error) or does not respond properly (a hardware

problem).

TRY THIS: Issue a 'show region' and check if the address location (the 'address'

part of the bus error - 0x0) falls within an existing address range. If the address

reported by the bus error does not fall within the ranges displayed in the 'show

region' output, this means that the router was trying to access an invalid address.

This indicates that it is a Cisco IOS Software problem. Paste the output from the

'show stacks' command to decode the output and identify the Cisco IOS Software

bug that is causing the bus error. If the address falls within one of the ranges

in the 'show region' output, it means that the router was accessing a valid memory

address, but the hardware corresponding to that address is not responding properly.

This indicates a hardware problem. Try reseating the hardware belonging to this

address range before attempting to replace it. Use the Troubleshooting Bus Error

Crashes document for additional assistance.

so may you post a sh region

But it is likely to be a SW error because address is 0x0

Hope to help

Giuseppe

Manish Prasad · ‎10-22-2009

Show region command is not running on this IOS.

By the way thank you for your help.

Thanks

Prasad

Saurabh.s · ‎08-16-2018

How to identify like in which sh region output the bus error address is lying....

Suppose Bus error address is 0x000BB4C4 and show region output as follows:

  Start         End     Size(b)  Class  Media  Name 

0x00000000  0x007FFFFF     8388608  Local  R/W    main 

0x00001000  0x0001922F       98864  IData  R/W    main:data 

0x00019230  0x000666B3      316548  IBss   R/W    main:bss 

0x000666B4  0x007FEFFF     7965004  Local  R/W    main:heap 

0x007FF000  0x007FFFFF        4096  Local  R/W    main:flhlog 

0x00800000  0x009FFFFF     2097152  Iomem  R/W    iomem 

0x03000000  0x037FFFFF     8388608  Flash  R/O    flash 

0x0304033C  0x037A7D3F     7764484  IText  R/O    flash:text

So, where the bus error address is lying and how we can identify. As per me , it should be in