Tenda V1200 - Ip Tunnel; Ipv6 Inipv4

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4.17 IP tunnel
An IP tunnel is an Internet Protocol (IP) network communications channel between two networks. It
is used to transport another network protocol by encapsulating one IP packet in another IP packet.
To encapsulate an IP packet in another IP packet, an outer header is added with source IP, the entry
point of the tunnel and the destination point, the exit point of the tunnel. While doing this, the
inner packet is unmodified.
The modem router provides two IP tunnels: IPv6inIPv4 and IPv4inIPv6.
4.17.1 IPv6inIPv4
4.17.1.1 Overview
IPv6inIPv4 is an internet transition mechanism for migrating from Internet Protocol version 4 (IPv4)
to IPv6. IPv6inIPv4 uses tunneling to encapsulate IPv6 traffic over explicitly-configured IPv4 links.
4.17.1.2 Configuring the IPv6inIPv4 tunnel
Step 1 Choose Advanced Setup > IP Tunnel > IPv6inIPv4 to enter the configuration page, and click
Add.
Step 2 Tunnel Name: Specify a name for the tunnel you set up.
Step 3 Mechanism: Set the 6in4 tunnel implement mechanism. The modem router only supports
6RD.
Step 4 Associated WAN Interface: Select an associated WAN interface for the 6in4 tunnel. The
WAN interface is required to use IPv4 protocol only.
Step 5 Associated LAN Interface: Select the LAN interface uses IPv6.
Step 6 Select a type of obtaining border relay address.
− Manual: Manually set a 6RD-BR address.
− Automatic: Automatically obtain a 6RD-BR address from BR. If you select Automatic, skip
step 7 to 9.
Step 7 IPv4 Mask Length: Enter the IPv4 mask length.
Step 8 6rd Prefix with Prefix Length: Enter the 6RD prefix with prefix length.
Step 9 Border Relay IPv4 Address: Enter the border relay IPv4 address of WAN interface.
Step 10 Click Apply/Save.