Hi,
Yesterday I tried to install c2960-lanbasek9.mz.12.55.SE4.bin onto my router. When I changed the boot commands, I did not leave the 2nd option in there and the old firmware has an .ex3 extension. After trying to boot to this new image, we receive a looping error message that continues to reboot and go through the same process.
Basically the error is "ERROR: firmware not supported by hardware"
I have power cycled it a few times but durning bootup, I never see the ################################## which would allow me to BREAK sequence and get into rommon. The device simply waits about 30-40 seconds after boot and goes right back to the looping reboot sequence and the error message.
Is there any hyper term or putty settings to change on this?