Upgrading cisco router iOS to a version that i am not sure is Suitable.

[s.maxina1]

Hi All

Asume that we have 2 image in Cisco router Flash. first image(i am not sure is suitable) is a new one which i downloaded recently and transfer it to router with tftp and the second is old one which is running now. is there any way when i reload the router, if the first one is not supported(for example because of hardware incompatibilty), automatically the old image yet run. since i want to remotely upgrade iOS, i want to sure that if new iOS is not correct, the old image will run and network will be up.

best regards

thanks.

[Leo Laohoo]

conf t
  boot system flash flash:NEW_IOS.bin
  boot system flash flash:OLD_IOS.bin
  boot system flash flash:
end

[s.maxina1]

hi Leo and thanks.

I have done it as follow:

conf t
  boot system flash flash:NEW_IOS.bin
  boot system flash flash:OLD_IOS.bin
end

but it doesn't work and it still try to load new image(it can not). is it needed to add third line as you(

boot system flash flash:

) or not?

[Leo Laohoo]

Console into the router and reboot. I want to see what the router is doing.
Post the complete output to the command "sh run | i boot".

[s.maxina1]

I will send it to you, but after image is uncompressed and installed then the below message shown and the device is resetting :

Error: *** Unsupported platforms ***
Error: hardware not supported by firmware.
Try loading newer software instead.
System Resetting..

 and the device is resetting and ...

[Leo Laohoo]

---

@s.maxina1 wrote:

Error: *** Unsupported platforms ***
Error: hardware not supported by firmware.

---

This error message is very self-explanatory.  This means the router is being forced to load a version that it doesn't understand.  

What is the exact version of the IOS and what router are you trying to get this loaded into?