i have a scenario where users from remote offices access internet through ho internet link (centralised). The solution required is, when the user tries to access the internet, the access is authorised based on the remote IP sbnet/username from proxy server, and then a counter starts for download size / connection time, on which an usage billing data is required to be generated. customer will provide for th unit which will be used for generating the cash bill to the user.
Please suggest if there is any solution for this using AAA and/or some other cisco software.
check this section,
In above link go for links under "Latest Cisco IOS NetFlow Documentation"
Also, check the,