TP-Link TL-WR842N User Manual page 117

5) Tunnel 6to4
 Address/Subnet Mask/Default Gateway - The IPv4 address/ subnet mask/ default gateway
assigned, in dotted-decimal notation.
 Tunnel Address - The 6to4 tunnel address created by the device to access to the IPv6
network.
 MTU Size - The normal MTU (Maximum Transmission Unit) value for most Ethernet networks
is 1480 Bytes. For some ISPs, you may need to modify the MTU. But this is rarely required,
and should not be done unless you are sure it is necessary for your ISP connection.
If your ISP gives you one or two DNS IPv6 addresses, select Use the following IPv6 DNS
Servers and enter the Primary IPv6 DNS and Secondary IPv6 DNS into the correct fields.
Otherwise, the DNS servers will be assigned from ISP dynamically.
 Primary IPv6 DNS - Enter the DNS IPv6 address in dotted-decimal notation provided by your
ISP.
 Secondary IPv6 DNS - Enter another DNS IPv6 address in dotted-decimal notation provided
by your ISP.
 Address Autoconfiguration Type - RADVD (Router Advertisement Daemon) and DHCPv6
(Dynamic Host Configuration Protocol for IPv6) Server.
 Site Prefix Configuration Type - The type of IPv6 address prefix.
Delegated - Get the IPv6 address prefix from the ISP automatically, and the device will
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delegate it to the LAN.
TL-WR842N 300Mbps Multi-Function Wireless N Router User Guide
Figure 4-107 Tunnel 6to4
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