Ruijie RG-S2900G-E Series, Configuration Manual

Page: 376 / 943

Configuration Guide DHCPv6 Configuration
sites. Terminal devices (such as PC) can realize auto-configuration of address via stateless
auto-configuration or stateful auto-configuration.
Fig 2 Prefix-based DHCPv6 application
The above figure illustrates the application of prefix-based DHCPv6 in IPv6 network.

Core router runs prefix delegation (PD) based DHCPv6 server.

IPv6 multi-service router runs the DHCPv6 client on the interface connecting to
the core router, acquiring prefix space from the core router and storing it in the
global prefix pool of IPv6.

IPv6 multi-service router enables auto-configuration on the interface connecting
to the desktop computer and runs interface-based router advertisement or
address assignment (NA) based DHCPv6 server.

The desktop computer completes address and parameter configuration via ND
or address assignment (NA) based DHCPv6 client.
In the above model, DHCPv6 fulfils the following functions:

The DHCP client (host, node) sends out prefix delegation (PD) based multicast
solicit message within the link to look for DHCPv6 servers.

The DHCP servers will send unicast advertisement message to the DHCP client
after receiving such solicitation message.

The DHCP client will select one server and send a multicast request message.

The DHCP server will then send a unicast reply message to complete address
assignment.
Introduction to the DHCPv6 Client
The DHCPv6 client can automatically acquire prefix space and other configuration parameters
from the DHCPv6 server. After obtaining the prefix space, the DHCP client will store it in the
global prefix space pool of IPv6, and then such prefix space can be assigned to other interfaces
via prefix partition for prefix advertisement.