i have a cisco 1720 router that i needed to upgrade the IOS. I went through the normal process of deleting the existing ram and uploading the new image. when i rebooted the router, i had this error :
loadprog: error - trouble reading file magic number
boot: cannot load "flash:"
when i do dir flash, i geth the information bellow.
rommon 5 > dir flash:
File size Checksum File name
0 bytes (0x0) 0xffff c1700-sv8y-mz.122-15.ZL1.bin
can anybody help me out this is extremely urgurnt.