Hi, I am planning to upgrade my CUE1.1 to version 2.1.2. Referring to the document Installing and Upgrading CUE which is downloaded from CISCO, the method to do it is to run the command "software clean download ftp.." on the router.
However my router (model 2851) do not recognize this command. Can anyone spare any pointers?
You need to already have 2.x to be able to use that method. Prior to 2.x the only upgrade option was via the boot helper. Take a look at: