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For CRT software, I think you don't need to change it.But for the Console port or console cable, you can check if the problem is from there.From my experience, I configured 2960X, there are two console ports what are RJ-45 console port and USBconsole...
Yes,Hi guys, I also got I/O error issues as I configured with "express console" port on the Cisco 2960x.Then I changed the console port of "RJ45", it succeeded.So my conclusion is that RJ45 console port is the correct one to transfer files/IOS image....
