I am having as5300.On one fine day it has gone in a RTR1(boot)> prompt after power on reset.It is not going to normal mode.I erased the entire flash: and tried to upload the compatible IOS image.Through tftp entire image is getting transferred but after verification the as5300 is rendering it as invalid checksum file.The size of the file on tftp and flash is correct.Also tried with different IOS images but of no avail.Pls help.
IC, what I believe even you have the exact size of during the file transfer but the checksum is not correct. It means there are some errors during the transmittion. In this case, I could like to suggest to select another IOS (or download it again from Cisco) and try again.
If the problem still exists, I suspect it is the flash failure.
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