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New Member

Problem with Cisco 2521: Cannot startup the router with normal image

Hi: I know this is an older router but I am using in my lab for testing purpose.

Origianally I had a problem upgrading the IOS image because I received message from the router saying the system flash not writable. So I found the article describing what to do to make the falsh writable: (the articale basically instructed me to use a configure-register 0x2102, it went on to say that after I reboot without saving the flash should be put back to the read-only mode) Well I followed the instructions but I could not copy the new IOS image from my TFTP server to the router, because it kept telling me that no protoco available. So i use the following command (no configure-register 0x2102). Now all I have is a > sign and none of the normal IOS command lines are working. Anybody with any idea how to fix this? I appreciate your help in advance.

Thanks

Sam

7 REPLIES
Silver

Re: Problem with Cisco 2521: Cannot startup the router with norm

Is this the document you have?

http://www.cisco.com/en/US/products/hw/iad/ps497/products_tech_note09186a0080110d2c.shtml

If you follow this closely you should be able you will be able to load a new ios image into the router.

Get out of the mode you are in (Rommon) by setting the register to 0x2102. Use ? to get help.

Hall of Fame Super Silver

Re: Problem with Cisco 2521: Cannot startup the router with norm

Sam

I am not clear whether you get into rommon because of the config register setting or because you have erased the existing image and not got the new image into flash yet. Setting the config register to 0x2102 and booting is a good start. It may fix the problem but if it does not then we may need to figure whether you have any valid image in flash.

HTH

Rick

Silver

Re: Problem with Cisco 2521: Cannot startup the router with norm

The original poster said he used "no configure-register 0x2102". I do not know what negating the config-register command does. Does it reconfigure with the previous value? I don't have a router available to test it.

Silver

Re: Problem with Cisco 2521: Cannot startup the router with norm

Ok,

I tested the "no config-register 0x2102" and it sets the register to 0x0 on the next reload.

Hall of Fame Super Silver

Re: Problem with Cisco 2521: Cannot startup the router with norm

Ahmed

That is good to know. And it suggests that assuming that they have not done anything else to the image in flash, that they should be able to do a boot from rommon and get back to normal operation. If they get back to normal operation it might be easier to set the config-register to normal 0x2102 in config mode that to modify it in rommon.

HTH

Rick

New Member

Re: Problem with Cisco 2521: Cannot startup the router with norm

Hi, If you r in rommon > mode & if u have not deleted the image then just say boot, router will boot from any available image then after booting u can change the config-reg parameters.

If it helps do rate it.

Ninja

New Member

Re: Problem with Cisco 2521: Cannot startup the router with norm

Hello

you are in rom monitor mode

type this command:

>o/r 0x2102(press enter)

>i (press enter)

the router must reload,This step causes the router to load the Cisco IOS software from the Flash with the configuration from NVRAM

sorry for my english.

if this don,t work type

>o

post the data please

I hope this could help you.

thanks

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