F3726, F3211, F3174, R5135, R3816-HP Firewalls and UTM Devices Network Management Configuration Guide-6PW100

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Figure 364 Format of DUID-LL
1694BIA
Identified by an IAID, an Identity Association (IA) provides a construct through which the obtained
addresses, prefixes, and other configuration parameters assigned from a server to a client are managed.
A client can have more than one IA assigned to it, for example, one for each of its interfaces, to manage
the addresses, prefixes, and other configuration parameters obtained by the interfaces.
1695BIAID
An IAID uniquely identifies an IA. It is chosen by the client and must be unique among the IAIDs on the
client.
1696BBinding
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.
1697BPD
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.
230B
DHCPv6 address/prefix assignment
A process of DHCPv6 address/prefix assignment involves two or four messages. The following describe
the detailed processes.
848BRapid assignment involving two messages
As shown in 2885HFigure 365, 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,
2886HAssignment involving four messages is implemented.