Forwarding IPv4 Traffics in Pure IPv6 Backbone with Stateless Address Mapping

As the IPv6 networks rapidly deployed, the transition problem has been changed. Because the transition of applications is a steady process with a far longer duration in comparison to the transition of infrastructure, providers cannot give up the duty of serving IPv4 traffics for the time being. On the other hand, operating a dual-stack backbone is highly costing for large-scale deployment of new networks. In this paper, a new technique of forwarding IPv4 traffics in IPv6-only backbone is developed. Rather than the ever-existing tunneling approaches, the proposed one is automatic and stateless for end nodes, without explicit tunneling. The route entries for delivering IPv4 traffics are well aggregated on the borders of IPv6 autonomous systems. This makes the technique suitable for large-scale deployment in an inter-domain networking environment