Configuration Guide Configuring DHCPv6
allocated to the DHCPv6 client. The DHCPv6 client completes configuration based on the information in the Reply
message.
Update and Rebinding
The DHCPv6 server provides the control address and the updated T1 and T2 in the IA of the message sent to the DHCPv6
client.
Figure 5-7
The DHCPv6 client will send a Renew multicast message to the DHCPv6 server for updating the address and prefix
after T1 seconds. The Renew message contains the DUID of the DHCPv6 server and the IA information to be updated.
After receiving the Renew message, the DHCPv6 server checks whether the DUID value in the Renew message is
equal to the DUID value of the local device. If yes, the DHCPv6 server updates the local binding and sends a Reply
message in the unicast mode. The Reply message contains the new T1 and other parameter s.
Figure 5-8
If no response is received after the DHCPv6 client sends a Renew message to the DHCPv6 server, the DHCPv6 client
will send a Rebind multicast message to the DHCPv6 server for rebinding the address and prefix after T2 expires.
After receiving the Rebind message, the DHCPv6 server (perhaps a new DHCPv6 server) sends a Reply message
according to the content of the Rebind message.
Release
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