Cisco 1721 router booting in ROMMON

Cisco / 1721
April 22, 2010 at 10:48:44
Specs: Windows XP
I have a Cisco 1721 router that is booting in ROMMON It has the right configuration register (0x2102)

It gives me this message during the bootup process:

Error : memory requirements exceed available memory
Memory required : 0x0276A4E4

*** System received a Software forced crash ***
signal= 0x17, code= 0x4, context= 0x8000c324
PC = 0x0, Vector = 0x0, SP = 0x0

Does anyone know what the problem could be and how to fix?

I seem to have a valid IOS. Here is the output from the show flash command:

dir flash:
File size Checksum File name
15669216 bytes (0xef17e0) 0xa3ed C1700-ADVENTERPRISEK9-MZ.123-26.BIN

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April 22, 2010 at 12:38:19
I am not a Certified Cisco Engineer (which is who should be doing this) but my guess would be you have to backup your current running config then reboot the router without loading the current IOS and then install the new IOS over the old one so that the old IOS does not take the memory required. The problem is you need a copy of your old IOS before you start because the new one moay not work and you do not want to brick it.

I am not sure what the command is to prevent the flash from loading when you reboot. I only had to ever do it once for a school project to see how you can reset the password if you forgot it.

I would not do any of this until someone who is Cisco Certified tells you it is ok.

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