Stateless DHCPv6 configuration example

As shown in Figure 60, through stateless DHCPv6, Switch A obtains the DNS server address, domain name, and other information from the server.

Switch B acts as the gateway to send RA messages periodically.

1. Configure Switch B

# Enable the IPv6 packet forwarding function.

<SwitchB> system-view
[SwitchB] ipv6

# Configure the IPv6 address of VLAN-interface 2.

[SwitchB] interface vlan-interface 2
[SwitchB-Vlan-interface2] ipv6 address 1::1 64

# Set the O flag in the RA messages to 1.

[SwitchB-Vlan-interface2] ipv6 nd autoconfig other-flag

# Enable Switch B to send RA messages.

[SwitchB-Vlan-interface2] undo ipv6 nd ra halt

1. Configure Switch A

# Enable the IPv6 packet forwarding function.

<SwitchA> system-view
[SwitchA] ipv6

# Enable stateless IPv6 address autoconfiguration on VLAN-interface 2.

[SwitchA] interface vlan-interface 2
[SwitchA-Vlan-interface2] ipv6 address auto

With this command executed, if VLAN-interface 2 has no IPv6 address configured, Switch A will automatically generate a link-local address, and send an RS message, requesting the gateway (Switch B) to reply with an RA message immediately.

After receiving an RA message with the M flag set to 0 and the O flag set to 1, Switch A automatically enables the stateless DHCPv6 function.

# Use the display ipv6 dhcp client command to view the current client configuration information. If the client successfully obtains configuration information from the server, the following information will be displayed.

[SwitchA-Vlan-interface2] display ipv6 dhcp client interface vlan-interface 2
Vlan-interface2 is in stateless DHCPv6 client mode
State is OPEN
Preferred Server:
    Reachable via address     :  FE80::213:7FFF:FEF6:C818
    DUID                      :  0003000100137ff6c818
    DNS servers               :  1:2:3::5
                                 1:2:4::7
    Domain names              :  abc.com
                                 Sysname.com

# Use the display ipv6 dhcp client statistics command to view the current client statistics.

[SwitchA-Vlan-interface2] display ipv6 dhcp client statistics
Interface                     :  Vlan-interface2
Packets Received              :  1
        Reply                 :  1
        Advertise             :  0
        Reconfigure           :  0
        Invalid               :  0
Packets Sent                  :  5
        Solicit               :  0
        Request               :  0
        Confirm               :  0
        Renew                 :  0
        Rebind                :  0
        Information-request   :  5
        Release               :  0
        Decline               :  0