Posts Tagged ‘tunnel’
For those of you that have been following the previous parts of this blog series (they are located in the IPv6 subcategory of the CCIE R&S category to the left), get ready for a major paradigm shift. So far, we have been experimenting with transition techniques (tunnels) that have focused on connecting remote “island” networks of IPv6 over an IPv4-only infrastructure. Now we are going to discuss a mechanism that was designed to help IPv4-only hosts communicate to other native IPv6 devices.
Intra-Site Automatic Tunnel Addressing Protocol (ISATAP) is most recently specified in RFC 5214. Notice the topology below that we will use to detail the workings of this transition approach. This internal network has RouterB in place that is not IPv6 capable . ISATAP provides a solution for the hosts behind this device! Dynamic tunneling will be done from these hosts to the ISATAP router (RouterA). Obviously, your job in the CCIE R&S Lab Exam might be to configure or troubleshoot this important device.