Organized by the Internet Society, 8 June 2011 was declared an one-day World IPv6 Day event. The World IPv6 Launch represents a major milestone in the global deployment of IPv6 ensuring a critical platform to sustain internet growth. If you are thinking what is IPv6 and why we need to upgrade from IPv4 (currently used) the following graphic and video will provide with you answers.
When the Internet launched operationally in 1983, no one ever dreamed that there might be billions of devices and users trying to get online. But like a telephone network that is running out of phone numbers, the current Internet is running out of IP addresses, and if we don't roll out Internet Protocol v6 (IPv6), we won't have the room we need to grow and the Internet would become tangled, unsafe and unsustainable.