write bus error interrupt...

[ashok_boin]

Hi,

I am having two routers say A & B both are Cisco 4500-M routers. A is having one ethernet module and two 4 high speed serial modules. B is having one ethernet, one module containing 2 high speed and 16 low speed(sync/async) and one 8 port BRI module. Due to our requirement, except ethernet modules, we have swapped all modules from A to B and B to A.

After that the A is now having BRI and one module of 2 high speed and 16 low speed serial ports and ethernet module. Whenever i am connecting the v.35 cable to one serial port, link is coming up, but is restarting in loop with this error...

"System received a write bus error interrupt"

Signal=0x15, Code = 0x0; context=0x60950130;

PC=0x602d8c68; cause=0x20 status reg=0x34008002

The context address is falling in the region( "sh region" ) command, in "main:bss".

Please provide me a solution as soon as possible.

Thanks in advance...

Rgds...

Ashok.

[Frederic Vanderbecq]

Disconnect the V35 cable to have the router reboot completely and provide us with a show version and show stack.

[ashok_boin]

Hi,

I am providing you what you wanted.

1. Sh version

4500>sh ver

Cisco Internetwork Operating System Software

IOS (tm) 4500 Software (C4500-I-M), Version 12.0(23), RELEASE SOFTWARE (fc1)

Copyright (c) 1986-2002 by cisco Systems, Inc.

Compiled Mon 01-Jul-02 17:42 by srani

Image text-base: 0x60008930, data-base: 0x606DE000

ROM: System Bootstrap, Version 5.3(16) [richardd 16], RELEASE SOFTWARE (fc1)

BOOTFLASH: 4500 Software (C4500-BOOT-M), Version 11.2(14)P, RELEASE SOFTWARE (f

c1)

STPI uptime is 4 minutes

System restarted by error - a Write Bus Error Interrupt, PC 0x606DA67C at 15:00:

29 IST Thu Aug 1 2002

System image file is "flash:c4500-i-mz.120-23.bin"

cisco 4500 (R4K) processor (revision E) with 32768K/16384K bytes of memory.

Processor board ID 07292900

R4700 processor, Implementation 33, Revision 1.0

G.703/E1 software, Version 1.0.

Bridging software.

X.25 software, Version 3.0.0.

Basic Rate ISDN software, Version 1.1.

2 Ethernet/IEEE 802.3 interface(s)

2 Serial network interface(s)

16 Low-speed serial(sync/async) network interface(s)

8 ISDN Basic Rate interface(s)

128K bytes of non-volatile configuration memory.

4096K bytes of processor board System flash (Read/Write)

4096K bytes of processor board Boot flash (Read/Write)

Configuration register is 0x2102

--

2. sh stack

4500>sh stack

Minimum process stacks:

Free/Size Name

5696/6000 Autoinstall

10652/12000 Setup

11320/12000 BootP Resolver

9936/12000 Init

5316/6000 RADIUS INITCONFIG

5192/6000 DHCP Client

Interrupt level stacks:

Level Called Unused/Size Name

2 1008 8556/9000 Network interfaces

3 0 9000/9000 High IRQ Int Handler

4 7890 8640/9000 Console Uart

6 0 9000/9000 Parity interrupt

7 66231 8604/9000 NMI Interrupt Handler

System was restarted by error - a Write Bus Error Interrupt, PC 0x606DA67C

4500 Software (C4500-I-M), Version 12.0(23), RELEASE SOFTWARE (fc1)

Compiled Mon 01-Jul-02 17:42 by srani (current version)

Image text-base: 0x60008930, data-base: 0x606DE000

Stack trace from system failure:

FP: 0x60CF9470, RA: 0x606DA67C

FP: 0x60CF9470, RA: 0x603AC240

FP: 0x60CF9498, RA: 0x603ABE48

FP: 0x60CF94F8, RA: 0x603AD644

FP: 0x60CF9510, RA: 0x602A5274

FP: 0x60CF9538, RA: 0x6029D920

FP: 0x60CF9560, RA: 0x6029DC50

FP: 0x60CF9580, RA: 0x6029E040

***************************************************

******* Information of Last System Crash **********

***************************************************

Please provide me any solution...

Rgds...

Ashok.