rommon

Answered Question
May 14th, 2010

If a router boots to the prompt rommon1>


does it signify that
the conf file was not found in flash memory OR
IOS image in flash memory is invalid or corrupt?

Correct Answer by Ganesh Hariharan about 6 years 9 months ago

If a router boots to the prompt rommon1>


does it signify that
the conf file was not found in flash memory OR
IOS image in flash memory is invalid or corrupt?

Hi ,


It means that the router cannot find a valid image in the flash memory. The image usually gets corrupted or lost.


Hope to Help !!


Ganesh.H


Remember to rate the helpful post

Correct Answer by Jon Marshall about 6 years 9 months ago

leepeiwai wrote:


If a router boots to the prompt rommon1>


does it signify that
the conf file was not found in flash memory OR
IOS image in flash memory is invalid or corrupt?


Peiwai


It can be a number of things but the commonest is that the router didn't find a bootable IOS version. Note an IOS version not the running-config. It can be because it doesn't have an image in flash or more likely that the config register has been set incorrectly.


Jon

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Correct Answer
Jon Marshall Fri, 05/14/2010 - 04:22

leepeiwai wrote:


If a router boots to the prompt rommon1>


does it signify that
the conf file was not found in flash memory OR
IOS image in flash memory is invalid or corrupt?


Peiwai


It can be a number of things but the commonest is that the router didn't find a bootable IOS version. Note an IOS version not the running-config. It can be because it doesn't have an image in flash or more likely that the config register has been set incorrectly.


Jon

Correct Answer
Ganesh Hariharan Fri, 05/14/2010 - 04:24

If a router boots to the prompt rommon1>


does it signify that
the conf file was not found in flash memory OR
IOS image in flash memory is invalid or corrupt?

Hi ,


It means that the router cannot find a valid image in the flash memory. The image usually gets corrupted or lost.


Hope to Help !!


Ganesh.H


Remember to rate the helpful post

Leo Laohoo Sun, 05/16/2010 - 02:58

1.  Your config-register tells the appliance to boot into ROMmon;
2.  Someone performed the intial password recovery (Ctrl+Break) or hold the Mode button during power up;
3.  In routers with no boot statement:  The first image is either corrupted or an invalid image;
4.  In routers with boot statement:  IOS file is not found; and
5.  In old switches, the boot statement is wrong or no IOS file found

kenlee1978 Sun, 05/16/2010 - 07:07

Basically it is the basic boot to the IOS. Like what Leo mentioned, you can break it or if the IOS is corrupted, you will get to this problem too.


Thanks,

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