User's Manual Part 1

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3.4.8.5 IPv6 in IPv4 Tunnel
1. IPv6 address in IPv4 Tunnel settings: you may add remote / local IPv4 address and local
IPv6 address, and then set DNS address manually for Primary DNS address and
secondary DNS address.
2. LAN IPv6 address settings: you can add LAN IPv6 address, and IPv6 Link-Local address
will be showed automatically.
3. Address auto configuration setting: Disable or enable this auto configuration setting.
You may set stateless or stateful( Dynamic IPv6), and also check if need to send Router
advertisement messages periodically.