RG              UP                      CP              AAA
     |PPPoE Discovery|      PPPoE Discovery   |               |
    1|<------------->|<---------via Si------->|               |
     |               |                        |               |
     |  PPP LCP      |        PPP LCP         |               |
    2|<------------->|<---------via Si------->|               |
     |               |                        |      AAA      |
     |  PPP PAP/CHAP |        PPP PAP/CHAP    |    Req/Rep    |
    3|<------------->|<---------via Si------->|<------------->|
     |               |                        |               |
     |  PPP IPCP     |        PPP IPCP        |               |
    4|<------------->|<---------via Si------->|               |
     |               |                        |               |
     |               |  Create v4 Subscriber  |               |
     |               |   Session Request      |               |
     |              5|<--------via Ci---------|               |
     |               |  Create v4 Subscriber  |               |
     |               |   Session Response     |               |
     |              6|---------via Ci-------->|               |
     |               |                        |   Accounting  |
     |               |                       7|<------------->|
     |  PPP IP6CP    |        PPP IP6CP       |               |
   4'|<------------->|<---------via Si------->|               |
     |               |                        |               |
     |               |  Create V6 Subscriber  |               |
     |               |   Session Request      |               |
     |             5'|<--------via Ci---------|               |
     |               |  Create v6 Subscriber  |               |
     |               |   Session Response     |               |
     |             6'|---------via Ci-------->|               |
     |               |                        |               |
     | ND Negotiation|     ND Negotiation     |               |
    8|<------------->|<---------via Si------->|               |
     |               |                        |               |
     |               |  Update v6 Subscriber  |               |
     |               |   Session Request      |               |
     |              9|<---------via Ci--------|               |
     |               |  Update v6 Subscriber  |               |
     |               |   Session Response     |               |
     |             10|---------via Ci-------->|               |
     |               |                        |   Accounting  |
     |               |                      7'|<------------->|
     |    DHCPv6     |        DHCPv6          |               |
     |  Negotiation  |      Negotiation       |               |
   8'|<------------->|<---------via Si------->|               |
     |               |                        |               |
     |               |  Update v6 Subscriber  |               |
     |               |   Session Request      |               |
     |             9'|<--------via Ci---------|               |
     |               |  Update v6 Subscriber  |               |
     |               |   Session Response     |               |
     |            10'|---------via Ci-------->|               |
     |               |                        |   Accounting  |
     |               |                      7"|<------------->|
     |               |                        |               |