How to load IOS from USB to Cisco 2921/k9 which is running in ROMmon?

[gagan1023026]

I have a Cisco 2921/k9 which doesn't have any IOS as of now & running in ROMmon. I want to load c2900-universalk9_npe-mz.SPA.151-2.T4.1.bin using USB drive. Since I'm a newbie, please guide step by step. Thanks!!

[Leo Laohoo]

If the USB stick is supported and recognized by the router, the command to boot the IOS from ROMmon is:  boot usbflash0:c2900-universalk9_npe-mz.SPA.151-2.T4.1.bin.

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[johnlloyd_13 · Accepted solution]

hi,

further adding to leo's post, after you've successfully booted the IOS from USB, you could copy the IOS to the router's flash:

copy usbflash0:c2900-universalk9_npe-mz.SPA.151-2.T4.1.bin flash

also make sure your config register is 0x2102.