1-2Figure 1-1 Format of DUID-LLTypical DHCPv6 Network ApplicationFigure 1-2 Network diagram for DHCPv6Figure 1-2 shows a typical DHCPv6 network. A DHCPv6 client uses a multicast address to contact theDHCPv6 server on the local link to obtain an IPv6 address and other configuration parameters. If theDHCPv6 server resides on another subnet, the DHCPv6 client can contact the server via a DHCPv6relay agent. Thus, you do not need to deploy a DHCPv6 server on each subnet.Currently, the device can only serve as the DHCPv6 client and relay agent. Serving as a DHCPv6 client,the device only supports stateless DHCPv6 configuration instead of stateful DHCPv6 configuration, thatis, the device can only obtain other network configuration parameters instead of an IPv6 address fromthe DHCPv6 server.Stateless DHCPv6 ConfigurationAfter obtaining an IPv6 address through stateless address autoconfiguration, a device can usestateless DHCPv6 to obtain other configuration parameters (such as the DNS server address or domainname) from a DHCPv6 server. Since the DHCPv6 server does not maintain the state information of thedevice, this application is called stateless DHCPv6 configuration.
