华三交换机

DHCPv6客户端典型配置举例

4.11.1  DHCPv6客户端申请地址及网络参数配置举例

1. 组网需求

DHCPv6客户端Switch从DHCPv6服务器获取IPv6地址，以及网络配置参数：DNS服务器地址、域名后缀、SIP服务器地址和SIP服务器域名。

DHCPv6客户端根据获取到的网络配置参数自动创建DHCPv6选项组1。

2. 组网图

图4-1 DHCPv6客户端申请地址及网络参数配置组网图

3. 配置步骤

# 配置VLAN接口2作为DHCPv6客户端获取IPv6地址及网络参数，配置DHCPv6客户端支持地址快速分配功能，并配置根据获取到的网络配置参数自动创建DHCPv6选项组1。

<Switch> system-view

[Switch] interface vlan-interface 2

[Switch-Vlan-interface2] ipv6 address dhcp-alloc rapid-commit option-group 1

[Switch-Vlan-interface2] quit

4. 验证配置

# 显示DHCPv6客户端的信息。可以看出DHCPv6客户端已经成功从DHCPv6服务器获取IPv6地址及网络参数。

[Switch] display ipv6 dhcp client

Vlan-interface2:

  Type: Stateful client requesting address

    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 08:06:57 (198 seconds left)

    DNS server addresses:

      2000::FF

    Domain name:

      ***.***

    SIP server addresses:

      2:2::4

    SIP server domain names:

      ***.***

# 在DHCPv6客户端上开启DHCPv6服务器功能后，显示动态创建的DHCPv6选项组1的信息。

[Switch] display ipv6 dhcp option-group 1

DHCPv6 option group: 1

  DNS server addresses:

    Type: Dynamic (DHCPv6 address allocation)

    Interface: Vlan-interface2

    2000::FF

  Domain name:

    Type: Dynamic (DHCPv6 address allocation)

    Interface: Vlan-interface2

    ***.***

  SIP server addresses:

    Type: Dynamic (DHCPv6 address allocation)

    Interface: Vlan-interface2

    2:2::4

  SIP server domain names:

    Type: Dynamic (DHCPv6 address allocation)

    Interface: Vlan-interface2

    ***.***

# 查看获取到的IPv6地址。

[Switch] display ipv6 interface brief

*down: administratively down

(s): spoofing

Interface                                Physical   Protocol   IPv6 Address

Vlan-interface2                          up         up         1:1::2

4.11.2  DHCPv6客户端申请前缀及网络参数配置举例

1. 组网需求

DHCPv6客户端Switch从DHCPv6服务器获取IPv6前缀，以及网络配置参数：DNS服务器地址、域名后缀、SIP服务器地址和SIP服务器域名等。

DHCPv6客户端Switch根据获取到的前缀自动创建IPv6前缀1，根据获取到的网络配置参数自动创建DHCPv6选项组1。

2. 组网图

图4-2 DHCPv6客户端申请前缀及网络参数配置组网图

3. 配置步骤

# 在客户端连接到DHCPv6服务器的VLAN接口2上配置IPv6地址。

<Switch> system-view

[Switch] interface vlan-interface 2

[Switch-Vlan-interface2] ipv6 address 1::2/48

# 配置VLAN接口2作为DHCPv6客户端获取IPv6前缀及网络参数，配置根据获取到的前缀自动创建IPv6前缀1，根据获取到的网络配置参数自动创建DHCPv6选项组1，并配置DHCPv6客户端支持前缀快速分配功能。

[Switch-Vlan-interface2] ipv6 dhcp client pd 1 rapid-commit option-group 1

[Switch-Vlan-interface2] quit

4. 验证配置

# 显示DHCPv6客户端的信息。可以看出DHCPv6客户端已经成功从DHCPv6服务器获取IPv6前缀及网络参数。

[Switch] display ipv6 dhcp client

Vlan-interface2:

  Type: Stateful client requesting prefix

    State: OPEN

    Client DUID: 0003000100e002000000

    Preferred server:

      Reachable via address: FE80::2E0:1FF:FE00:18

      Server DUID: 0003000100e001000000

    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 Feb 4 2014 at 15:37:20（80 seconds left）

    DNS server addresses:

      2000::FF

    Domain name:

      ***.***

    SIP server addresses:

      2:2::4

    SIP server domain names:

      ***.***

# 显示动态创建的IPv6前缀1的信息。

[Switch] display ipv6 prefix 1

Number: 1

Type  : Dynamic

Prefix: 12:34::/48

Preferred lifetime 100 sec, valid lifetime 200 sec

# 在DHCPv6客户端上开启DHCPv6服务器功能后，显示动态创建的DHCPv6选项组1的信息。

[Switch] display ipv6 dhcp option-group 1 

DHCPv6 option group: 1

  DNS server addresses:

    Type: Dynamic (DHCPv6 prefix allocation)

    Interface: Vlan-interface2

    2000::FF

  Domain name:

    Type: Dynamic (DHCPv6 prefix allocation)

    Interface: Vlan-interface2

    ***.***

  SIP server addresses:

    Type: Dynamic (DHCPv6 prefix allocation)

    Interface: Vlan-interface2

    2:2::4

  SIP server domain names:

    Type: Dynamic (DHCPv6 prefix allocation)

    Interface: Vlan-interface2

    ***.***

4.11.3  DHCPv6客户端同时申请地址、前缀及网络参数配置举例

1. 组网需求

DHCPv6客户端Switch从DHCPv6服务器同时获取IPv6地址、IPv6前缀，以及网络配置参数：DNS服务器地址、域名后缀、SIP服务器地址和SIP服务器域名等。

DHCPv6客户端Switch根据获取到的前缀自动创建IPv6前缀1，根据获取到的网络配置参数自动创建DHCPv6选项组1。

2. 组网图

图4-3 DHCPv6客户端同时申请地址、前缀及网络参数配置组网图

3. 配置步骤

# 在客户端连接到DHCPv6服务器的VLAN接口2上配置IPv6地址。

<Switch> system-view

[Switch] interface vlan-interface 2

[Switch-Vlan-interface2] ipv6 address 1::2/48

# 配置VLAN接口2作为DHCPv6客户端获取IPv6前缀及网络参数，配置根据获取到的前缀自动创建IPv6前缀1，根据获取到的网络配置参数自动创建DHCPv6选项组1，并配置DHCPv6客户端支持前缀快速分配功能。

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

[Switch-Vlan-interface2] quit

4. 验证配置

# 显示DHCPv6客户端的信息。可以看出DHCPv6客户端已经成功从DHCPv6服务器获取IPv6前缀及网络参数。

[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:

      ***.***

    SIP server addresses:

      2:2::4

    SIP server domain names:

      ***.***

# 查看获取到的IPv6地址。

[Switch] display ipv6 interface brief

*down: administratively down

(s): spoofing

Interface                                Physical   Protocol   IPv6 Address

Vlan-interface2                          up         up         1:1::2

# 显示动态创建的IPv6前缀1的信息。

[Switch] display ipv6 prefix 1

Number: 1

Type  : Dynamic

Prefix: 12:34::/48

Preferred lifetime 100 sec, valid lifetime 200 sec

# 在DHCPv6客户端上开启DHCPv6服务器功能后，显示动态创建的DHCPv6选项组1的信息。

[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

    ***.***

  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

    ***.***

以上三条display命令可以看到客户端获取到的地址信息、前缀信息和网络参数。

4.11.4  DHCPv6无状态配置举例

1. 组网需求

·     DHCPv6客户端Switch A通过DHCPv6无状态配置获取域名服务器、域名等信息；

·     Switch B作为网关，周期性发布RA消息。

2. 组网图

图4-4 DHCPv6无状态配置组网图

3. 配置步骤

(1)     配置网关Switch B

# 配置VLAN接口2的IPv6地址。

<SwitchB> system-view

[SwitchB] interface vlan-interface 2

[SwitchB-Vlan-interface2] ipv6 address 1::1 64

# 配置RA消息中O标志位为1。

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

# 配置允许发送RA消息。

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

(2)     配置DHCPv6客户端Switch A

# 在VLAN接口2上使能IPv6地址无状态自动配置功能。

<SwitchA> system-view

[SwitchA] interface vlan-interface 2

[SwitchA-Vlan-interface2] ipv6 address auto

执行此命令后，如果VLAN接口2下未配置地址，Switch A会自动生成链路本地地址，并主动发送RS（Router Solicitation，路由器请求）报文，请求网关Switch B立即回应RA报文。

4. 验证配置

如果收到的RA报文中M标志位为0、O标志位为1，Switch A就会启动DHCPv6客户端无状态配置。

# 可以通过display ipv6 dhcp client命令查看当前客户端的配置信息，如果从服务器成功获取了配置，将会有类似的显示信息。

[SwitchA-Vlan-interface2] display ipv6 dhcp client interface vlan-interface 2

Vlan-interface2：

 Type: Stateless client

    State: OPEN

    Client DUID: 00030001000fe2ff0000

    Preferred server:

      Reachable via address: FE80::213:7FFF:FEF6:C818

      Server DUID: 0003000100137ff6c818

    DNS server addresses:

      1:2:4::5

      1:2:4::7

    Domain name:

      ***.***

# 可以通过display ipv6 dhcp client statistics命令查看当前客户端的统计信息。

[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

        Renew                 :  0

        Rebind                :  0

        Information-request   :  5

        Release               :  0

        Decline               :  0