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cisco 1841 trouble

Unanswered Question
Jul 16th, 2012
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Hi everybody.


I have a cisco 1841 router which isn't able to boot properly from its IOS. it always prompt me on ROMMN.

Here it is:



System Bootstrap, Version 12.4(13r)T8, RELEASE SOFTWARE (fc1)

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

Copyright (c) 2008 by cisco Systems, Inc.

PLD version 0x10

GIO ASIC version 0x127

c1841 platform with 262144 Kbytes of main memory

Main memory is configured to 64 bit mode with parity disabled





Upgrade ROMMON initialized

program load complete, entry point: 0x8000f000, size: 0xcb80

program load complete, entry point: 0x8000f000, size: 0xcb80



program load complete, entry point: 0x8000f000, size: 0xd4a9a0

Self decompressing the image : ######################################################################################################################################### [OK]



Smart Init is enabled

smart init is sizing iomem

  ID            MEMORY_REQ         TYPE

                0X003AA110 public buffer pools

                0X00211000 public particle pools

                0X000021B8 Onboard USB



If any of the above Memory Requirements are

"UNKNOWN", you may be using an unsupported

configuration or there is a software problem and

system operation may be compromised.



Allocating additional 21135724 bytes to IO Memory.

PMem allocated: 239075328 bytes; IOMem allocated: 29360128 bytes





TLB (load or instruction fetch) exception, CPU signal 10, PC = 0x6020C48C





-Traceback= 0x6020C48C 0x6128D2B4 0x6128D350 0x6128C9A4 0x6128CBA4 0x6020D1B0 0x6056F1E0 0x6007ED54 0x8000FDC8 0x8000F9B8

$0 : 00000000, AT : 62370000, v0 : 00000000, v1 : 624A1240

a0 : 00000003, a1 : 00000001, a2 : 00000001, a3 : 62377820

t0 : 626D0FF4, t1 : 62700DFC, t2 : 62700DF8, t3 : 62700DF4

t4 : 62700DF0, t5 : 62700DEC, t6 : 62700DE8, t7 : 62700DE4

s0 : CE2B0000, s1 : 00FFFFFF, s2 : 7FFFFFFF, s3 : 62378840

s4 : 00000001, s5 : 62360000, s6 : 00000003, s7 : 624A1300

t8 : 62700E48, t9 : 00000000, k0 : 3041E801, k1 : 00100000

gp : 6237AF40, sp : 8000EC68, s8 : 00000000, ra : 6020C420

EPC  : 6020C48C, ErrorEPC : 01068224, SREG     : 3401C103

MDLO : 0000000D, MDHI     : 023E5960, BadVaddr : CE2B0020

Cause 80000008 (Code 0x2): TLB (load or instruction fetch) exception





TLB (load or instruction fetch) exception, CPU signal 10, PC = 0x0





-Traceback=

$0 : 00000000, AT : 62370000, v0 : 00000000, v1 : 00000040

a0 : 621A3130, a1 : FFFFFFFF, a2 : 621A30BC, a3 : FFFFFFFF

t0 : 00000000, t1 : 00000000, t2 : 00000000, t3 : 00000000

t4 : 00000000, t5 : 0000000D, t6 : 023E5960, t7 : CE2B0020

s0 : 621A3008, s1 : 621A3130, s2 : 621A30BC, s3 : 00000000

s4 : 00000000, s5 : FFFFFFFF, s6 : 7FFFFFFF, s7 : 0000000A

t8 : 62700E48, t9 : 00000000, k0 : 624EF790, k1 : 00000020

gp : 6237AF40, sp : 621A2FE0, s8 : FFFFFFFF, ra : 608E2328

EPC  : 00000000, ErrorEPC : 01068224, SREG     : 34018003

MDLO : 00000000, MDHI     : 00000008, BadVaddr : 00000000

Cause 00002008 (Code 0x2): TLB (load or instruction fetch) exception



Nested write_crashinfo call (2 times)





TLB (load or instruction fetch) exception, CPU signal 10, PC = 0x0





-Traceback=

$0 : 00000000, AT : 62370000, v0 : 62360000, v1 : 62478010

a0 : 00000002, a1 : 00000000, a2 : 00000000, a3 : 000F4240

t0 : 00000038, t1 : 34018001, t2 : 34018000, t3 : FFFF00FF

t4 : 60561810, t5 : 00002008, t6 : 00000000, t7 : CE2B0020

s0 : 0000000A, s1 : 00002008, s2 : 0000000A, s3 : 00000000

s4 : 00002008, s5 : 62530000, s6 : 00000038, s7 : 624F0000

t8 : 62700E48, t9 : 00000000, k0 : 624EF790, k1 : 00000038

gp : 6237AF40, sp : 621A2F00, s8 : 621A0000, ra : 6055D0BC

EPC  : 00000000, ErrorEPC : 01068224, SREG     : 34018003

MDLO : 0001E848, MDHI     : 00000000, BadVaddr : 00000000

Cause 00002008 (Code 0x2): TLB (load or instruction fetch) exception



Nested write_crashinfo call (3 times)





TLB (load or instruction fetch) exception, CPU signal 10, PC = 0x0





-Traceback=

$0 : 00000000, AT : 62370000, v0 : 62360000, v1 : 62478010

a0 : 00000002, a1 : 00000000, a2 : 00000000, a3 : 000F4240

t0 : 00000038, t1 : 34018001, t2 : 34018000, t3 : FFFF00FF

t4 : 60561810, t5 : 00002008, t6 : 00000000, t7 : CE2B0020

s0 : 0000000A, s1 : 00002008, s2 : 0000000A, s3 : 00000000

s4 : 00002008, s5 : 62530000, s6 : 00000038, s7 : 624F0000

t8 : 62700E48, t9 : 00000000, k0 : 624EF790, k1 : 00000038

gp : 6237AF40, sp : 621A2F00, s8 : 621A0000, ra : 6055D0BC

EPC  : 00000000, ErrorEPC : 01068224, SREG     : 34018003

MDLO : 0001E848, MDHI     : 00000000, BadVaddr : 00000000

Cause 00002008 (Code 0x2): TLB (load or instruction fetch) exception



-Traceback=





and it stops there with nothing. when I remove the Compact Flash, it prompt me on rommon.

If somembody have an idea what's happen , please help.


Thank you.

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Peter Paluch Mon, 07/16/2012 - 23:27
User Badges:
  • Cisco Employee,

Hello Lova,


Did the same IOS image work on this router before? If yes and this error simply started suddenly appearing, it may suggest a problem with RAM modules. Try opening the router, remove and reseat the DRAM modules and see if this helps.


If you have another 1841 router available, perhaps it would be beneficial to try to boot this other router from your CF card to see if the card and the IOS stored on it is capable of booting properly in a different router, although I don't think this is the case, as the IOS image was unpacked with no problems during your boot.


Best regards,

Peter

Lova RABAKO Thu, 07/19/2012 - 23:41
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Hi, thank you for your reply, Peter.


I also suspected the RAM module...is one from a laptop computer would be compatible?  I have other 1841 but I can't stop them at this time to do a permutation so I manage to do that next time. The CF card was never removed and never modified. the router was runing on it till it down.

Peter Paluch Fri, 07/20/2012 - 00:54
User Badges:
  • Cisco Employee,

Hello Lova,


I have indeed heard about people being able to re-use laptop DRAM modules in Cisco routers. However, it is not without risks - while I suggest trying that out if possible, I strongly urge you to find (Google is your friend) as much information about the chips used on both Cisco and laptop DRAM modules as possible, with particular respect to the required voltage so that you don't burn out or underpower the laptop memory module.


Please let me know.


Best regards,

Peter

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