08-24-2010 02:26 AM - edited 03-04-2019 09:31 AM
Hey
I managed to wipe my IOS from my Cisco 877 Series router.
Now using TFTP I have managed to reload the software and boot up the Router (previously I was stuck in Rommom mode).
If I power the router off and turn it back on I am brought back to Rommom mode again and have to reload the IOS again.
What command do I need to use to make the newly downloaded bin file my main flash file that the router now boots from?
Thanks a mil
Solved! Go to Solution.
08-24-2010 05:30 AM
Hello,
What option are you using when you TFTP the IOS to the router? Are you by
any chance using "tftpdnld -r" option? Please try the following:
Step 1: Upload the file via tftpdnld (like before)
Step 2: Boot the router
Step 3: Check the flash content and make sure that image is there.
Issue the command "show flash" at "Router#" prompt
Step 4: If the image is missing, copy the image
Issue the command "copy tftp flash" at "Router#" prompt
Step 5: Set the configuration register value to 0x2102
Issue the command "config-register 0x2102" at "Router(conifg)#" prompt
Step 6: Make sure that there is no boot statement in your configuration
Issue the command "show run | i boot system" command at "Router#" prompt and
make sure that there is no output for that command
Hope this helps.
Regards,
NT
08-24-2010 02:31 AM
A quick search would have revealed this to you.
config-reg 0x2102
And, you can boot from an image in flash at rommon prompt.
08-24-2010 02:34 AM
I couldnt boot from Rommon mode as there was no bin image at all and an error kept
being thrown back. I will try that other command, thanks.
08-24-2010 02:42 AM
What I mant, after you boot from TFTP, the image is copied to flash, no no further TFTP is necessary.
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08-24-2010 02:56 AM
Hi
I reloaded my bin file from my tftp server, then went into config t when the router booted up and typed in config-reg 0x2102 as described.
I then did a copy run start.
When I powered off the router and powered it back on again I got
No bootable image: flash:/
Unable to open boot file
And I am back at the Rommon prompt again
Any ideas?
Thanks
08-24-2010 02:57 AM
Please publish the output of
Step1:rommon 1 > dir flash:
change the registry value
Step2: rommon 1 > confreg 0x2101 or rommon 1 > confreg 0x2102
boot the system
Step3: rommon 2 >
boot
08-24-2010 03:01 AM
08-24-2010 05:30 AM
Hello,
What option are you using when you TFTP the IOS to the router? Are you by
any chance using "tftpdnld -r" option? Please try the following:
Step 1: Upload the file via tftpdnld (like before)
Step 2: Boot the router
Step 3: Check the flash content and make sure that image is there.
Issue the command "show flash" at "Router#" prompt
Step 4: If the image is missing, copy the image
Issue the command "copy tftp flash" at "Router#" prompt
Step 5: Set the configuration register value to 0x2102
Issue the command "config-register 0x2102" at "Router(conifg)#" prompt
Step 6: Make sure that there is no boot statement in your configuration
Issue the command "show run | i boot system" command at "Router#" prompt and
make sure that there is no output for that command
Hope this helps.
Regards,
NT
08-24-2010 06:30 AM
Ah thanks a mil, that worked perfectly! All back up and running again.
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