配置DHCPv6中继示例

SE_YT

2025-6-30

交换机

配置DHCPv6中继示例

组网需求

如图1所示，用户所在网络地址为fc00:2::/64，DHCPv6服务器的地址为fc00:3::3/64。用户希望通过DHCPv6方式获取IPv6地址。客户端和服务器在不同网段，需要通过DHCPv6中继转发报文。

将交换机作为DHCPv6中继，为客户端和服务器转发报文。交换机同时作为fc00:2::/64网络的网关设备，通过RA消息中的M标志位和O标志位指定该网络中的主机通过DHCPv6获取IPv6地址和其他网络配置参数。

图1 DHCPv6中继组网图
配置DHCPv6中继示例

配置思路

DHCPv6中继的配置思路如下：

配置接口的IPv6地址，实现设备之间的IPv6通信功能。
配置DHCPv6中继功能，实现设备转发DHCPv6服务器和DHCPv6客户端之间报文功能。

操作步骤

配置接口的IPv6功能

<HUAWEI> system-view
[~HUAWEI] sysname SwitchA
[*HUAWEI] commit
[~SwitchA] interface 10ge 1/0/1
[~SwitchA-10GE1/0/1] undo portswitch
[*SwitchA-10GE1/0/1] ipv6 enable
[*SwitchA-10GE1/0/1] ipv6 address fc00:2::1 64
[*SwitchA-10GE1/0/1] quit
[*SwitchA] interface 10ge 1/0/2
[*SwitchA-10GE1/0/2] undo portswitch
[*SwitchA-10GE1/0/2] ipv6 enable
[*SwitchA-10GE1/0/2] ipv6 address fc00:3::1 64
[*SwitchA-10GE1/0/2] quit
[*SwitchA] commit

配置DHCPv6中继功能

[~SwitchA] dhcpv6 enable
[*SwitchA] interface 10ge 1/0/1
[*SwitchA-10GE1/0/1] dhcpv6 relay destination fc00:3::3
[*SwitchA-10GE1/0/1] commit

配置SwitchA发布RA消息，并配置M和O标志位

[~SwitchA-10GE1/0/1] ipv6 nd ra halt disable
[*SwitchA-10GE1/0/1] ipv6 nd autoconfig managed-address-flag
[*SwitchA-10GE1/0/1] ipv6 nd autoconfig other-flag
[*SwitchA-10GE1/0/1] commit
[~SwitchA-10GE1/0/1] quit

验证配置结果

# 在SwitchA上使用display dhcpv6 relay statistics命令用来查看DHCPv6中继转发报文的统计信息。

[~SwitchA] display dhcpv6 relay statistics
  -------------------------------------------------------------------
  Bad packets received                                :   0
  DHCPv6 packets received from clients                :   41357
         DHCPv6 SOLICIT packets received              :   41357
         DHCPv6 REQUEST packets received              :   0
         DHCPv6 CONFIRM packets received              :   0
         DHCPv6 RENEW packets received                :   0
         DHCPv6 REBIND packets received               :   0
         DHCPv6 DECLINE packets received              :   0
         DHCPv6 RELEASE packets received              :   0
         DHCPv6 INFORMATION-REQUEST packets received  :   0
                                                           
  DHCPv6 packets received from relay agents or servers:   6
         DHCPv6 RELAY-FORWARD packets received        :   6
         DHCPv6 RELAY-REPLY packets received          :   0
                                                           
  DHCPv6 packets sent to clients                      :   6
         DHCPv6 ADVERTISE packets sent                :   6
         DHCPv6 REPLY packets sent                    :   0
         DHCPv6 RECONFIGURE packets sent              :   0
                                                           
  DHCPv6 packets sent to relay agents or servers      :   41333
         DHCPv6 RELAY-FORWARD packets sent            :   41333
         DHCPv6 RELAY-REPLY packets sent              :   0
                                                           
  DHCPv6 packets dropped                              :   24
         Table full                                   :   0
         General error                                :   24
         IPSec authentication failed                  :   0
  -------------------------------------------------------------------

配置文件

SwitchA的配置文件

#
sysname SwitchA
#
dhcpv6 enable
#
interface 10GE1/0/1
 undo portswitch
 ipv6 enable
 ipv6 address FC00:2::1/64
 ipv6 nd ra halt disable
 ipv6 nd autoconfig managed-address-flag
 ipv6 nd autoconfig other-flag
 dhcpv6 relay destination FC00:3::3
#
interface 10GE1/0/2
 undo portswitch
 ipv6 enable
 ipv6 address FC00:3::1/64
#
return

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作者：SE_YT

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