This is what I guessed, backup of Cisco IOS and/or Cisco config files. That is precisely where my expertise in TFTP originates

To backup the IOS, you will have to touch a file (and give open permissions) to the same name of the file you are saving. When you do a 'write net' on the Cisco boxes, it will ask for the name/ip of the TFTP server AND the name of the file (the Cisco IOS gives a default). That file MUST exist in the TFTP directory of the server.

So before you do a 'write net' you much touch a file with the same name as the file you are writing. For example, on the server:

Code:

cd /etc/tftp
touch cisco-ios-dec-05-v11.03a
chmod 666 cisco-ios-dec-05-v11.03a

On the router you would then 'write net' file name, cisco-ios-dec-05-v11.03a. (use your own file names). The confusion most people have is that the file must exist in the TFTP directory in order to write it from a device, like the Cisco IOS. To read the file (get), you must know the exact name of the file you are 'getting'. Same is true for Cisco configurations:

Code:

cd /etc/tftp
touch router-bigmomma-new-access-lists-dec-06
chmod 666 router-bigmomma-new-access-lists-dec-06

I forget the exact Cisco syntax, so if you need help in that area, please login to the router from an X or other GUI telnet session and use the mouse to capture the screen (Cisco console) and upload to this thread. I can help you through the 'write net' and other commands between the Cisco IOS and your UNIX TFTP platform.

[Edited by Neo on 12-07-2000 at 06:35 PM]