My common mistakes when configuring Cisco
I Can not access ROMMON using ctrl-break ?
Sometimes I cannot access ROMMON using Break or Ctrl-Break keys, later I find out that I must use Break- right Ctrl keys instead of left Break-left Ctrl.
Cannot copy IOS image file from router to TFTP server ?
I once cannot copy IOS image files from router’s flash memory to TFTP server. Although I tried with many ways. I found that I wrongly read l and 1, thats very silly but the letter and the figure are very similar. The file name and directory are something like this: c3550-i5q3l2-mz.121-13.EA1a/c3550-i5q3l2-mz.121-13.EA1a.bin
Cannot connect to router’s console at all.
Sometimes we saw garbage character in the router’s console, we must adjust serial’s baud rate to 19200 (normally 9600) to be able to login to console.
But when you can not see garbage character at all, try to open the case and examine whether the ribbon cable properly connected or not.
