Router automatically goes to ROMMON mode

kumarpmt83 · ‎02-10-2012

Hi,

I have one problem in my Client end router cisco 1841.

Everyday we switch on the router it will automatically goes to ROMMON mode.

So i take remotly and check wheather the IOS is corrupted or not.

So i use the command dir flash: to check IOS is available or not. i found the IOS is there.But it is not boot from IOS.

So i use the coomand boot xxxx.bin to boot from IOS.and finally it booted.

i am not able to do this work everyday.

Anyone give the permanent solution.

But i search in the internet they give some steps.

They told to use the coomand confreg in the ROMMON mode.

And also i check everything fine.

Kindly give me the solution.

Leo Laohoo · ‎02-10-2012

In ROMmon mode, please enter the command "confreg 0x2102".

ebarticel · ‎02-10-2012

Once you have booted the router in normal mode you need to set up the boot and config register

Router(config)# boot system flash: filename

Router(config)#config-register 0x2102

Save the configuration and reload the router

It should work

Eugen

kumarpmt83 · ‎02-11-2012

As per u advice i am tried but it again come same problem.

can u tell anyother way to solve the issue.

ebarticel · ‎02-11-2012

You said that when you use the boot command it boots in IOS ok.

While in IOS use "show version" and "show flash:" and post the output

Eugen

kumarpmt83 · ‎02-11-2012

DSO#sh version

Cisco IOS Software, 1841 Software (C1841-ADVSECURITYK9-M), Version 12.4(11)T, RELEASE SOFTWARE (fc2)

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

Compiled Sat 18-Nov-06 15:46 by prod_rel_team

ROM: System Bootstrap, Version 12.4(13r)T, RELEASE SOFTWARE (fc1)

DSO uptime is 5 hours, 46 minutes

System returned to ROM by power-on

System image file is "flash:c1841-advsecurityk9-mz.124-11.T.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

export@cisco.com.

Cisco 1841 (revision 6.0) with 235520K/26624K bytes of memory.

Processor board ID FHK104615Y2

2 FastEthernet interfaces

1 Serial(sync/async) interface

1 ISDN Basic Rate interface

1 Virtual Private Network (VPN) Module

DRAM configuration is 64 bits wide with parity disabled.

191K bytes of NVRAM.

62720K bytes of ATA CompactFlash (Read/Write)

Configuration register is 0x2102

DSO#sh flash:

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

1 17793652 Nov 16 2006 12:12:56 +05:30 c1841-advsecurityk9-mz.124-3g.bin

2 1821 Nov 16 2006 12:29:58 +05:30 sdmconfig-18xx.cfg

3 4734464 Nov 16 2006 12:30:38 +05:30 sdm.tar

4 833024 Nov 16 2006 12:31:06 +05:30 es.tar

5 1052160 Nov 16 2006 12:31:36 +05:30 common.tar

6 1038 Nov 16 2006 12:32:02 +05:30 home.shtml

7 102400 Nov 16 2006 12:32:24 +05:30 home.tar

8 491213 Nov 16 2006 12:32:50 +05:30 128MB.sdf

9 1684577 Nov 16 2006 12:33:36 +05:30 securedesktop-ios-3.1.1.27-k9.pkg

10 398305 Nov 16 2006 12:34:10 +05:30 sslclient-win-1.1.0.154.pkg

11 22649648 Feb 22 2007 11:58:48 +05:30 c1841-advsecurityk9-mz.124-11.T.bin

14249984 bytes available (49762304 bytes used)

DSO#

Leo Laohoo · ‎02-11-2012

Nothing wrong with your "sh ver" and "dir" output.

Can you provide the output to the command "sh run | i boot"?

May I ask if you can console into the router and reboot? I would like to see the complete bootup process.

Kyujin Choi · ‎12-11-2013

I have a same issue, but it is not always. I saw that router suddenly goes to ROMmon without any reason.

I like to know whether you found the reason or solution.

Thanks for your time and effort.

Leo Laohoo · ‎12-11-2013

I have a same issue, but it is not always. I saw that router suddenly goes to ROMmon without any reason.

Not always? Maybe your router crashed?