Setting DHCPv6 Overview
An IPv6 router can only be a DHCPv6 server and an IPv6 host can only be a DHCP client. As a DHCPv6 client, the interface can make the following requests from a DHCPv6 server:
Delegation of long-lived prefixes across an administrative boundary—The server does not have to know the topology of the targeted local network. For example, an ISP can use DHCPv6 to assign prefixes to downstream networks through downstream DHCP clients. To speed up the client/server interaction, the client can request rapid commit (if enabled). Rapid commit reduces the number of messages from four to two.
IP addresses of available DNS servers—The interface can also request DNS search-list information. This list contains partial domain names, which assist DNS searches by concatenating entered usernames to the domain names.
As a DHCPv6 server, the interface can provide both of these services to a DHCPv6 client. To speed up prefix delegation, an IPv6 router configured to be a DHCPv6 server can support a rapid commit option. You can also set a server preference option.
In the DHCPv6 screen, you can configure options such as a device-unique identification (DUID), an identity association for prefix delegation identification (IAPD-ID), prefix features, a server preference, a DHCPv6 server, a DHCPv6 client, and a DHCPv6 relay agent