HP VPN Firewall Appliances Network Management Configuration Guide

705
Binding
The DHCPv6 server uses bindings to record the configuration information assigned to DHCPv6 clients,
including the IPv6 address/prefix, client DUID, IAID, valid lifetime, preferred lifetime, and lease
expiration time.
PD
The DHCPv6 server creates a Prefix Delegation (PD) for each assigned prefix to record the IPv6 prefix,
client DUID, IAID, valid lifetime, preferred lifetime, and lease expiration time.
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
As shown in Figure 366, the rapid assignment involving two messages operates as follows:
1. The DHCPv6 client sends out a Solicit message that contains a Rapid Commit option, requesting
that rapid assignment of address/prefix and other configuration parameters should be preferred.
2. If the DHCPv6 server supports rapid assignment, it responds with a Reply message containing the
assigned IPv6 address/prefix and other configuration parameters. If the DHCPv6 server does not
support rapid assignment, Assignment involving four messages is implemented.
Figure 366 Rapid assignment involving two messages
Assignment involving four messages
Figure 367 shows the process of IPv6 address/prefix assignment involving four messages.
Figure 367 Assignment involving four messages