How to Configure IPv6 Over IPv6 Tunnels

1. Become Superuser.

2. Create the file /etc/hostname6.ip6.tunn. Use the values 0, 1, 2, and so on, for n. Then, add entries by following these steps.

   1. Add the tunnel source address. Then, add the tunnel destination address.

      tsrc IPv6-source-address tdst IPv6-destination-address IPv6-packet-source-address IPv6-packet-destination-address up

   2. (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.

Example—Entry in the IPv6 Configuration File to Create an IPv6 over IPv6 Tunnel

This example shows the entry for an IPv6 over IPv6 tunnel.

tsrc 2000::114:a00:20ff:fe72:668c tdst 2000::103:a00:20ff:fe9b:a1c3
fe80::4 fe80::61 up