6NET is a three-year European project to demonstrate that continued growth of the Internet can be met using new IPv6 technology. It also aims to help European research and industry play a leading role in defining and developing the next generation of networking technologies. In the context of Voice over IP, the 6Net partners are deploying and experimenting with Voice over IP solutions, both SIP and H.323, using IPv6. This work involves porting of open source Voice over IP solutions such as the SIP Express Router to IPv6, provisioning of components to allow transparent Voice over IP communication between IPv4 and IPv6 networks and finally testing and deploying SIP and H.323 IPv6 capable components over a European wide IPv6 network. The project will be finished in 12.2004.