Telenor Research in Tromsø, Norway designed and implemented an IPv6 network mostly based on radio links in cooperation with the Department of Computer Science at the University of Tromsø and Invenia Innovation AS. It covers most of the city. The purpose of establishing such a large pilot network is to experiment with an infrastructure that in design will be identical to what an ISP will have in the last phase of migration from IPv4 to IPv6. That is, an infrastructure where the ISP only supports IPv6 inside the network, but where customers will have legacy applications that can not run on anything but IPv4. Customers will have nodes running IPv6-only, IPv4-only and dual-stack.

In this experiment, the users have been staff from Telenor Research, faculty and technical staff from the Department of Computer Science, and students. The level of user competence has varied tremendously, from seasoned IPv6 administrators to complete novices with regards to IPv6 or (network) technology in general. The unmanaged networks were the home networks of these users. This experiment is therefore an example of Scenario D identified by the IETF deployment team on unmanaged networks.

The network has been designed to mimic the situation that an ISP will face and problems related to traffic at the user level is not in our focus. This leads to the following requirements:

• An IPv6-only core.
• All home networks must support a mix of IPv6-only, dual stack and IPv4-only hosts.
• IPv6-only should not need any modification.
• IPv6-only nodes must have access to services that run IPv4 only (outside of our network)
• Nodes running IPv4 only should have a functionality and performance as if the ISP supported
IPv4 native.
• Nodes running IPv4-only must be given access to services on IPv6-only.
• The machinery for transition from IPv4 to IPv6 must be transparent.