Router(boot)> mode ---What is this?

[omal]

Hi

My 2501 router boots and comes to a mode where the prompt looks like this:

Router(boot)>

I have very limited commands available in this mode. Can someone please let me know how to go back to normal mode and what this mode is?

Thanks in advance!

[Joe Clarke]

This is boot helper or boot mode. This mode is there to help one upgrade IOS on run-from-flash devices. You can get to this mode in one of two ways. Either your main IOS image is missing or damaged, or the config-register has been set to something like 0x2101. Do a show ver. If you see the config register is set to anything other than 0x2102, enter config mode, and do:

config-register 0x2102

Then exit config mode and reload. Do not save the config. If all goes well, you should reboot from the main IOS image in flash.