Configuring the DHCPv6 server on an interface

Enable the DHCP server and configure one of the following address/prefix assignment methods on an interface:

• Apply an address pool on the interface—The DHCPv6 server selects an IPv6 address/prefix from the applied address pool for a requesting client. If there is no assignable IPv6 address/prefix in the address pool, the DHCPv6 server cannot to assign an IPv6 address/prefix to a client.

• Configure global address assignment on the interface—The DHCPv6 server selects an IPv6 address/prefix in the global DHCPv6 address pool that matches the server interface address or the DHCPv6 relay agent address for a requesting client.

If you configure both methods on an interface, the DHCPv6 server uses the specified address pool for address assignment without performing global address assignment.

• An interface cannot act as a DHCPv6 server and DHCPv6 relay agent at the same time.

• Do not enable DHCPv6 server and DHCPv6 client on the same interface.

• You can apply an address pool that has not been created to an interface. The setting takes effect after the address pool is created.

1. Enter system view.

   system-view

2. Enter interface view.

   interface interface-type interface-number

3. Enable the DHCPv6 server on the interface.

   ipv6 dhcp select server

   By default, the interface does not act as a DHCP server or a DHCP relay agent, and discards DHCPv6 packets from DHCPv6 clients.

4. Configure an assignment method.

   • Configure global address assignment.

     ipv6 dhcp server { allow-hint | preference preference-value | rapid-commit } *

     By default, desired address/prefix assignment and rapid assignment are disabled, and the default preference is 0.

   • Apply a DHCPv6 address pool to the interface.

     ipv6 dhcp server apply pool pool-name [ allow-hint | preference preference-value | rapid-commit ] *