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DES-7200 Configuration Guide Chapter 7 DHCPv6 Server Configuration
7-7
Fig 2. Simplified 2-message interaction
Between Server and Client, the Relay can be introduced to complete the address
assignment between Client and Server. The Solicit message sent by the Client to the
Server will be wholly encapsulated in the Relay-forward message as an option. The
Server will decode the solicit information contained in the incoming message and
encapsulate the reply information in the Relay option of Relay-reply message, and
then send the Relay-reply message to the Relay, which will decode the reply
information and forward to the Client, as shown below:
Fig 3. Interaction between Server, Relay and Client
In case the network connection of Client has changed, the Client will send Confirm
message to the Server to verify the availability of the resources previously assigned
by the Server. After receiving the message, the Server will respond with a Reply
message, as shown below:
Fig 4. Server responding to the Confirm message
If the Client uses stateless address configuration but also acquires other parameters
through DHCP, then the Client will send an Information-request message to the Sever,
which will respond with a Reply message, as shown below: