Check if DRAM and compact flash card are working cisco 1841 router

[Clay Plaga]

Is there a command to check if the DRAM and the compact flash are working? I have an 1841 on my test network. I need to use the K9 IOS for SSH login configurations. It's in flash but the K9 IOS can't load into NVRAM startup. I think the DRAM is bad. I have ordered a replacement DRAM bank. Any other ideas? Screen shot included.

Thank you.

[Leo Laohoo]

Make sense. That file is not a valid IOS to boot.

[Clay Plaga]

Thank you. Please forgive my ignorance. I just started learning this 2 weeks ago. How did you determine that the IOS wasn't a valid file? What should I look for? I assume I have to acquire a legitimate K9 IOS for the 1841. Do I have to purchase this IOS?

[balaji.bandi · Accepted solution]

IOS image always in most cases end with .bin file (for example for your models - c181x-advipservicesk9-mz.151-4.M12a.bin)

if you have cisco CCO account access to download IOS image you can download.

or google is your friend for learning purpose - there may be some images available to download.