+--------+                  +--------+                     +--------+
| DHCPv6 |                  | DHCPv6 |                     | DHCPv6 |
| client |                  | relay  |                     | server | 
+--------+                  +--------+                     +--------+
   |                            |                                |
   +-----1. Solicit(IA_LL)----->|                                |
   |                            +----2. Relay-forward            |
   |                            |    (Solicit(IA_LL),QUAD)------>|
   |                            |                                |
   |                            |<---3. Relay-reply              |
   |                            |    (Advertise(IA_LL(LLADDR)))--+
   |<4. Advertise(IA_LL(LLADDR))+                                |
   |-5. Request(IA_LL(LLADDR))->|                                |
   |                            +-6. Relay-forward               |
   |                            | (Request(IA_LL(LLADDR)),QUAD)->|
   |                            |                                |
   |                            |<--7. Relay-reply               |
   |                            |   (Reply(IA_LL(LLADDR)))-------+
   |<--8. Reply(IA_LL(LLADDR))--+                                |
   |                            |                                |
   .                            .                                .
   .                    (timer expiring)                         .
   .                            .                                .
   |                            |                                |
   +--9. Renew(IA_LL(LLADDR))-->|                                |
   |                            |--10. Relay-forward             |
   |                            |  (Renew(IA_LL(LLADDR)),QUAD)-->|
   |                            |                                |
   |                            |<---11. Relay-reply             |
   |                            |     (Reply(IA_LL(LLADDR)))-----+
   |<--12. Reply(IA_LL(LLADDR))-+                                |
   |                            |                                |