3com S7906E Manuel De Montage

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Stateless address autoconfiguration means that a node automatically generates an IPv6 address 
based on the information obtained through router/prefix discovery. For details, refer to IPv6 Basics 
Configuration in the IP Services Volume
 
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. 
Two types of messages are exchanged in the operation of stateless DHCPv6: the information request 
message sent by the client and the reply message sent by the server. 
Figure 1-3 Operation of Stateless DHCPv6 
 
 
As shown in 
, stateless DHCPv6 operates as follows: 
1)  The DHCPv6 client multicasts an information request message to the destination address 
FF02::1:2. The information request message contains the option request option, specifying 
configuration parameters that the client requests from the DHCPv6 server. 
2)  After receiving the information request message, the DHCPv6 server returns a reply message 
containing the requested configuration parameters to the client. 
3)  The client checks the reply message. If the obtained configuration parameters match those 
requested in the information request message, the client performs network configuration with the 
parameters. If multiple replies are received, the first received reply will be used. 
Operation of DHCPv6 Relay Agent 
A DHCPv6 relay agent and DHCPv6 server exchange two types of messages, Relay-forward and 
Relay-reply.