Configuring Stateless Dhcpv6; Operation - HP 6125G Configuration Manual

If the DHCPv6 client receives no response from the DHCPv6 servers, the client stops using the
address/prefix when the valid lifetime expires. For more information about the valid lifetime and the
preferred lifetime, see
Figure 52 Using the Rebind message for address/prefix lease renewal

Configuring stateless DHCPv6

After obtaining an IPv6 address/prefix, a device can use stateless DHCPv6 to obtain other configuration
parameters from a DHCPv6 server. This application is called stateless DHCPv6 configuration.
With an IPv6 address obtained through stateless address autoconfiguration, a device automatically
enables the stateless DHCPv6 function after it receives an RA message with the managed address
configuration flag (M flag) set to 0 and with the other stateful configuration flag (O flag) set to 1.
Stateless address autoconfiguration means that a node automatically generates an IPv6 address based
on the information obtained through router/prefix discovery. For more information, see
IPv6 basics."

Operation

Figure 53 Operation of stateless DHCPv6
As shown in
The DHCPv6 client multicasts an Information-request message to the multicast address of all
1.
DHCPv6 servers and DHCPv6 relay agents. The Information-request message contains an Option
Request option, specifying the configuration parameters that the client requests from the DHCPv6
server.
After receiving the Information-request message, the DHCPv6 server returns the client a Reply
2.
message containing the requested configuration parameters.
The client checks the Reply message. If the obtained configuration parameters match those
3.
requested in the Information-request message, the client performs network configuration with the
"Configuring IPv6
Figure 53, stateless DHCPv6 operates in the following steps:
basics."
108
"Configuring