Configuration procedure

Configure Switch A as a DHCPv6 relay agent:

# Enable the IPv6 packet forwarding function.

<SwitchA> system-view
[SwitchA] ipv6

# Configure the IPv6 addresses of VLAN-interface 2 and VLAN-interface 3, respectively.

[SwitchA] interface vlan-interface 2
[SwitchA-Vlan-interface2] ipv6 address 2::1 64
[SwitchA-Vlan-interface2] quit
[SwitchA] interface vlan-interface 3
[SwitchA-Vlan-interface3] ipv6 address 1::1 64

# Enable DHCPv6 relay agent and specify the DHCPv6 server address on VLAN-interface 3.

[SwitchA-Vlan-interface3] ipv6 dhcp relay server-address 2::2

Configure Switch A as a gateway:

# Enable Switch A to send RA messages and turn on the M and O flags.

[SwitchA-Vlan-interface3] undo ipv6 nd ra halt
[SwitchA-Vlan-interface3] ipv6 nd autoconfig managed-address-flag
[SwitchA-Vlan-interface3] ipv6 nd autoconfig other-flag