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the LAN1 network address is assigned to use 2002:7a64:dcee:1::/64 and the LAN1 IP address is
set to 2002:7a64:dcee:1::111/128.
A relay router R (192.99.88.1) is used in this example in order to forward 6to4 packets to any
unknown IPv6 addresses.
1.7.1 Configuration Concept
After the 6to4 tunnel settings are complete, IPv4 and IPv6 packets transmitted between WAN1 and
LAN1 will be handled by the USG through the following flow.
Figure 25 6to4 Tunnel Configuration Concept
1.7.2 Setting Up the LAN IPv6 Interface
1 In the CONFIGURATION > Network > Interface > Ethernet screen’s IPv6 Configuration
section, double-click the lan1.
2 The Edit Ethernet screen appears. Select Enable Interface and Enable IPv6.
Type 2002:7a64:dcee:1::111/128 in the IPv6 Address/Prefix Length field for the LAN1’s IP
address.
Enable Router Advertisement. Then click Add in the Advertised Prefix Table to add
2002:7a64:dcee:1::/64. The LAN1 hosts will get the network prefix through the router
advertisement messages sent by the LAN1 IPv6 interface periodically. Click OK.
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