F3726, F3211, F3174, R5135, R3816-HP Firewalls and UTM Devices Network Management Configuration Guide-6PW100
725
3. After obtaining the Solicit message from the Relay-forward message, the DHCPv6 server selects an
IPv6 address and other required parameters, and adds them to the reply which is encapsulated
within the Relay Message option of a Relay-reply message. The DHCPv6 server then sends the
Relay-reply message to the DHCPv6 relay agent.
4. The DHCPv6 relay agent obtains the reply from the Relay-reply message and sends the reply to the
DHCPv6 client.
Then the DHCPv6 client uses the IPv6 address and other configuration parameters assigned by the
DHCPv6 server to perform network configuration.
Figure 377 Operating process of a DHCPv6 relay agent
247B
Configuration prerequisites
Before you configure the DHCPv6 relay agent, enable IPv6 by using the ipv6 command in system view.
248B
Configuration guidelines
• Executing the ipv6 dhcp relay server-address command repeatedly can specify multiple DHCPv6
servers. Up to eight DHCPv6 servers can be specified for an interface. After receiving requests from
DHCPv6 clients, the DHCPv6 relay agent forwards the requests to all the specified DHCPv6 servers.
• If the DHCPv6 server address is a link-local address or link-scoped multicast address on the local
link, you must specify an outgoing interface by using the interface keyword in the ipv6 dhcp relay
server-address command. Otherwise, DHCPv6 packets may fail to be forwarded to the DHCPv6
server.
• After you remove all the specified DHCPv6 servers from an interface with the undo ipv6 dhcp relay
server-address command, DHCPv6 relay agent is disabled on the interface.
• An interface cannot serve as a DHCPv6 relay agent and DHCPv6 server at the same time.
• Do not enable the DHCPv6 relay agent and DHCPv6 client on the same interface.
249B
Configuration procedure
To configure the DHCPv6 relay agent:
Ste
p
Command
Remarks
1026. Enter system view.
system-view N/A
(1) Solicit (contains a Rapid Commit option)
(4) Reply
DHCPv6 client DHCPv6 relay agent DHCPv6 server
(2) Relay-forward
(3) Relay-reply