error showing

When I start my Cisco router it shows me the attached error. What is the problem with the NVRAM of the router and how do I fix it? Thanks.

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    Dec 25, 2018 at 9:48

1 Answer 1


The problem is exactly what is stated in the message you see: the nvram (non volatile ram) of your router is corrupted.

You need to change it.

It seems it is something quite easy to do, provide you get a replacement flash SIMM.

Cisco provide the procedure here:

Cisco 2600 - Replacing the Internal Flash Memory SIMM

Note: in some routers the NVRAM is different from Flash. It seems in the 2600 the NVRAM is actually on the FLASH but I'm not 100% confident and don't have time right now to check it.

  • 1
    In a 2600 (router), the NVRAM is in the RTC. The battery on that thing is only designed for ~10 years. It also looks like flash is corrupt. He could break into ROMMON and see if it's accessible.
    – Ricky
    Oct 23, 2018 at 14:00

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