This section describes how you configure IPv6 over IPv4 tunnels.
Create the file /etc/hostname6.ip.tunn. Use the values 0, 1, 2, and so on, for n. Then add entries following these steps.
Add the tunnel source addresses. Then add the tunnel destination addresses.
tsrc IPv4-source-addr tdst IPv4-destination-addr up
(Optional) Add a logical interface for the source and destination IPv6 addresses.
addif IPv6-source-address IPv6-destination-address up
Omit this step if you want the address autoconfigured for this interface. You do not need to configure link-local addresses for your tunnel. Link-local addresses are configured automatically.
When you finish configuring the tunnels, you must reboot.
You must perform the same steps at the other end of the tunnel for bidirectional communication to occur.
If your system is to be configured as a router, you must also configure your router to advertise over tunneling interfaces before rebooting. See How to Configure Your Router to Advertise Over Tunneling Interfaces.
This example shows a tunnel for which all IPv6 addresses are autoconfigured.
tsrc 18.104.22.168 tdst 192.168.7.19 up
This example shows a tunnel for which global source and global destination addresses are manually configured. The site-local source and site-local destination addresses are also manually configured.
tsrc 22.214.171.124 tdst 126.96.36.199 up addif fec0::1234:a00:fe12:528 fec0::5678:a00:20ff:fe12:1234 up addif 2::1234:a00:fe12:528 2::5678:a00:20ff:fe12:1234 up
Following these steps for each tunnel.