RG              UP                       CP             AAA
     |      RS       |                        |               |
    1|-------------->|                        |               |
     |               |  Relay the RS          |               |
     |              2|-----to CP via Si------>|      AAA      |
     |               |                        |    Req/Rep    |
     |               |                       3|<------------->|
     |               |  Create Subscriber     |               |
     |               |   Session Request      |               |
     |              4|<--------via Ci---------|               |
     |               |                        |               |
     |               |  Create Subscriber     |               |
     |               |   Session Response     |               |
     |              5|---------via Ci-------->|               |
     |               |                        |               |
     |               |  Send RA               |               |
     |              6|<----to UP via Si-------|               |
     |      RA       |                        |               |
    7|<--------------|                        |               |
     |               |                        |               |
     |DHCPv6 Solicit |                        |               |
    8|-------------->|                        |               |
     |               |  Relay DHCPv6 Solicit  |               |
     |              9|-----to CP via Si------>|               |
     |               |                        |               |
     |               |  Update Subscriber     |               |
     |               |   Session Request      |               |
     |             10|<--------via Ci---------|               |
     |               |                        |               |
     |               |  Update Subscriber     |               |
     |               |   Session Response     |               |
     |             11|---------via Ci-------->|               |
     |               |                        |   Accounting  |
     |               |                      12|<------------->|
     |               |  Send DHCPv6 Reply     |               |
     |             13|<----to UP via Si-------|               |
     |               |                        |               |
     | DHCPv6 Reply  |                        |               |
   14|<--------------|                        |               |
     |               |                        |               |