H3C Technologies H3C SecPath F1000-E - Manual (Page 80)

1
DHCPv6 Overview
This chapter includes these sections:
• Introduction to DHCPv6
• DHCPv6 Address/Prefix Assignment
• Address/Prefix Lease Renewal
• Stateless DHCPv6 Configuration
Introduction to DHCPv6
The Dynamic Host Configuration Protocol for IPv6 (DHCPv6) was designed based on IPv6 addressing
scheme and is used for assigning IPv6 prefixes, IPv6 addresses and other configuration parameters to
hosts.
Compared with other IPv6 address allocation methods (such as manual configuration and stateless
address autoconfiguration), DHCPv6 can:
• Record addresses assigned to hosts and assign specific addresses to hosts, thus facilitating network
management.
• Assign prefixes to devices, thus facilitating automatic configuration and management of the entire
network.
• Assign other configuration parameters, such as the DNS server addresses and domain names, to
hosts.
DHCPv6 Address/Prefix Assignment
A process of DHCPv6 address/prefix assignment involves two or four messages. The following describe
the detailed processes.
Rapid Assignment Involving Two Messages
Figure 1 Rapid assignment involving two messages
(1) Solicit (contains a Rapid
Commit option)
DHCPv6 client DHCPv6 server
(2) Reply
As shown in Figure 1 , the process of rapid assignment involving two messages is as follows: