Internet grows, so it’s cracking, soon will all IPv4 addresses be allocated and a solution is urgently needed. The new protocol, IPv6 is the solution to this problem. With a size of 128 bits against IPv4s 32 bits gives IPv6 a huge amount of addresses to distribute. The security addition that may be added manually in IPv4 is the standard with the new protocol. To implement IPv6 will not get done over a day, and the various protocols are not talking with each other so the transition will be a problem. A solution for this is dual-stack that allows a node using both protocols.
The aim of the thesis is to examine how the reach ability is with IPv6 is on different pages, which claim to use dual-stack. To see if it was an improvement, the results will be compared with results from the survey Empirical Performance of IPv6 vs.. IPv4 under a Dual-Stack Environment. The aim has been achieved through the theoretically learn about IPv6 protocol. After this, a survey which was later compiled, compared and presented in this work. The survey results show that the IPv6 network has increased since the last survey. It also shows that practical with IPv4 is about the same level as in the investigation being compared. This indicates that dual-stack is used and that it will in time be moving in a pure IPv6 Internet.