t Addressing and Address Resolution nese government has mandated that all its public networks must adopt IPv6. This is in part because Japan has embraced 3G wireless phones, which require IPv6 for networking. It is believed that the mobile market will be the greatest pusher of IPv6 because wireless is going to challenge IPv4's address availability. Currently it is not possible to expand the address range with NAT and retain functionality for wireless devices. With the proliferation of globally routable IP-aware devices- such as mobile phones, videogame consoles, PDAs, smart cars, and wearables-an accompanying demand for wireless Web access is occurring, making migration to IPv6 a necessity. There is very little end-user or application demand for IPv6, however. The cur- rent stumbling blocks to major deployment of IPv6 networks globally include the lack of wide-scale network infrastructure deployment and a lack of killer applica- tions that require IPv6 to function. The primary benefits of IPv6 at this time accrue at the network management level, in areas such as intradomain routing, network configuration, end-to-end security, and address space management. In 1996 the IETF established 6bone (www.6bone.net) as an IPv6 testbed net- work to enable IPv6 testing as well as to assist in the transitioning of IPv6 into the Internet. It operated under the IPv6 address allocation 3FFE::/16. More than 1,173 networks in some 60 countries were connected to the 6bone IPv6 network. 6bone started as a virtual network, using IPv6-over-IPv4 tunneling/encapsulation, operat- ing over the IPv4-based Internet to support IPv6 transport. It slowly migrated to native links for IPv6 transport. 6bone ceased to operate in June 2006, and IANA reclaimed all 6bone prefixes. The Moonv6 Project The Moonv6 project (http://moonv6.sr.unh.edu) is a global effort led by the North American IPv6 Task Force (NAv6TF; www.nav6tf.org), involving the University of New Hampshire InterOperability Laboratory (UNH IOL; www.iol.unh.edu), Internet 2 (www.internet2