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Step 3: Select IP over Ethernet as WAN service type. Edit the Enter Service Description. This field is optional. We
recommend that you keep the default. Select a network protocol: IPv6 Only. And then click Next.
Step 4: Enter the WAN information provided by your ISP to configure the WAN IPv6 settings.
To obtain an IP address automatically:
Select Obtain an IPv6 address automatically and Check Dhcp6c Prefix Delegation (IAPD).
If your ISP is using stateful DHCPv6, check Dhcp6c Address Assignment (IANA) also. Click Next to go forwards.