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HiI was trying to upgrade our Cisco Switch of 2960 24TTL, and in the process and after I copied the ISO bin file to the flash: , I entered the command "boot system newiosimage.bin" which is incomplete and I should have mentioned the location (flash:)...
Hi Everyone,I had the same problem.In my case opening the Port # 69 (UDP & TCP) was not enough, I had to open Anything to get it to work..Hope it helps someone.