ZyXEL Communications VPN Series Handbook page 719

Note: All network IP addresses and subnet masks are used as examples in this article.
Please replace them with your actual network IP addresses and subnet masks. This example
was tested using USG310 (Firmware Version: ZLD 4.25).
Set Up the LAN IPv6 Interface on the ZyWALL/USG
The second and third sets of 16-bit IP address from the left must be converted
from wan1 IP (122.100.220.238 in this example). It becomes 7a64:dcee in
hexadecimal. (You can go to
an IPv4 address into it's default 6-to-4 equivalent). You are free to use the fourth
set of 16-bit IP address from the left in order to allocate different network
addresses (prefixes) to IPv6 interfaces. In this example, the LAN1 network address
is assigned to use 2002:7a64:dcee:1::/64 and the LAN1 IP address is set to
https://isc.sans.edu/tools/ipv6.html#form
www.zyxel.com
to convert
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