RG UP CP AAA | | L3 access | | | | control list | | | 1|<----via Ci-----| | | User | | | | traffic | | | 2|------------>| | | | | User traffic | | | 3|-----via Si---->| | | | | AAA | | | | Req/Rep | | | 4|<-------->| | | | | | | Create Session | | | | Request | | | 5|<----via Ci-----| | | | Create Session | | | | Response | | | 6|----via Ci----->| | | | | |