HP VPN Firewall Appliances Network Management Configuration Guide

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DHCPv6 overview
DHCPv6 can be configured only at the CLI.
The Dynamic Host Configuration Protocol for IPv6 (DHCPv6) provides a framework to assign IPv6
prefixes, IPv6 addresses, and other configuration parameters to hosts.
Basic concepts
Multicast addresses used by DHCPv6
DHCPv6 uses the multicast address FF05::1:3 to identify all DHCPv6 servers on the site-local scope, and
uses the multicast address FF02::1:2 to identify all DHCPv6 servers and relay agents on the link-local
scope.
DUID
A DHCP unique identifier (DUID) uniquely identifies a DHCPv6 device (DHCPv6 client, server, or relay
agent). A DHCPv6 device adds its DUID in a sent packet.
The DUID includes many types. The device supports only the DUID based on link-layer address (DUID-LL)
defined in RFC 3315.
Figure 365 sh
ows the DUID-LL format, w
here:
• DUID type—The device supports the DUID type of DUID-LL with the value of 0x0003.
• Hardware type—The device supports the hardware type of Ethernet with the value of 0x0001.
• Link layer address—Takes the value of the bridge MAC address of the device.
Figure 365 Format of DUID-LL
IA
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.
IAID
An IAID uniquely identifies an IA. It is chosen by the client and must be unique among the IAIDs on the
client.