Configuration procedure

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

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.