With the huge amount of computers connected to the Internet the IP-addresses are starting to run out. The Internet Engineering Task Force, IETF, have decided that it is about time to exchange the old 32 bits Internet protocol, Ipv4, to a more modern 128 bits protocol called Ipv6. This thesis explores the possibility to install Ipv6 in different operating systems. By testing various operating systems and by set up criteria compare them to each other we give the reader a picture of how the installation is done. We also show which operating systems to prefer if you want to use IPv6. The chosen operating systems are different Windows versions and Linux RedHat versions. The result of our testing reveals that it does not really matter which of the more recent versions of the operating systems, Windows XP or Linux RedHat 7.2, you use since they have come quite far ahead in their Ipv6 development.