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