In our previous article on IPv6 tunnels, we looked at manual GRE and IPv6IP Tunnels in order to provide connectivity for IPv6 networks segregated by an IPv4 network. By tunneling IPv6 over IP, we can migrate our internal networks to IPv6 and still have communication between these networks, even though we are seperated by an IPv4 network. In this article we will be using another method to provide connectivity for IPv6 networks segregated by an IPv4 network: The Automatic 6to4 Tunnel! Mastering IPv6 is not only an important part of a CCIE candidates journey, but will become increasingly important as the global pool of IPv4 addresses diminishes….
Lets face it, sooner or later we are going to move to IPv6. Probably closer to the sooner side than some of us are comfortable with. In this series of articles we will be introducing tunnels and taking a look at how they can be used as part of you migration towards IPv6. Working with IPv6 tunnels is also an important part of a CCIE candidate’s journey, so mastering them is important. In this article we will be looking at tunnelling IPv6 over IPv4 using manual tunnels specifically using GRE and IPv6 in IPv4.