IPv6 address and prefix acquisition configuration example

As shown in Figure 79, configure the switch to use DHCPv6 to obtain configuration parameters from the DHCPv6 server. The parameters include IPv6 address, IPv6 prefix, DNS server address, domain name suffix, SIP server address, and SIP server domain name.

You must configure the DHCPv6 server before configuring the DHCPv6 client. For information about configuring the DHCPv6 server, see "Configuring the DHCPv6 server."

# Configure an IPv6 address for VLAN-interface 2 that is connected to the DHCPv6 server.

<Switch> system-view
[Switch] interface vlan-interface 2
[Switch-Vlan-interface2] ipv6 address 1::2/48

# Configure VLAN-interface 2 as a DHCPv6 client for IPv6 address and prefix acquisition. Specify IDs for the dynamic IPv6 prefix and dynamic DHCPv6 option group, and configure the client to support rapid address and prefix assignment.

[Switch-Vlan-interface2] ipv6 dhcp client stateful prefix 1 rapid-commit option-group 1
[Switch-Vlan-interface2] quit

# Verify that the DHCPv6 client has obtained an IPv6 address, an IPv6 prefix, and other configuration parameters from the DHCPv6 server.

[Switch] display ipv6 dhcp client
Vlan-interface2:
  Type: Stateful client requesting address and prefix
    State: OPEN
    Client DUID: 0003000100e002000000
    Preferred server:
      Reachable via address: FE80::2E0:1FF:FE00:18
      Server DUID: 0003000100e001000000
    IA_NA: IAID 0x00000642, T1 50 sec, T2 80 sec
      Address: 1:1::2/128
        Preferred lifetime 100 sec, valid lifetime 200 sec
        Will expire on Mar 27 2014 at 08:02:00 (199 seconds left)
    IA_PD: IAID 0x00000642, T1 50 sec, T2 80 sec
      Prefix: 12:34::/48
        Preferred lifetime 100 sec, valid lifetime 200 sec
        Will expire on Mar 27 2014 at 08:02:00 (199 seconds left)
    DNS server addresses:
      2000::FF
    Domain name:
      example.com
    SIP server addresses:
      2:2::4
    SIP server domain names:
      bbb.com

# Verify that the DHCPv6 client has obtained an IPv6 address.

[Switch] display ipv6 interface brief
*down: administratively down
(s): spoofing
Interface                                Physical   Protocol   IPv6 Address
Vlan-interface2                          up         up         1:1::2

# Verify that the client has obtained an IPv6 prefix.

[Switch] display ipv6 prefix 1
Number: 1
Type  : Dynamic
Prefix: 12:34::/48
Preferred lifetime 100 sec, valid lifetime 200 sec

# Verify that the client has created a dynamic DHCPv6 option group for saving configuration parameters.

[Switch] display ipv6 dhcp option-group 1
DNS server addresses:
    Type: Dynamic (DHCPv6 address and prefix allocation)
    Interface: Vlan-interface2
    2000::FF
  Domain name:
    Type: Dynamic (DHCPv6 address and prefix allocation)
    Interface: Vlan-interface2
    example.com
  SIP server addresses:
    Type: Dynamic (DHCPv6 address and prefix allocation)
    Interface: Vlan-interface2
    2:2::4
  SIP server domain names:
    Type: Dynamic (DHCPv6 address and prefix allocation)
    Interface: Vlan-interface2
    bbb.com