Lancaster University has had a Mobile IPv6 testbed in one form or another since 1997. In those early years we used Lancaster University’s own implementation running on Linux. Since then, more extensive research efforts (some with the help of Lancaster University to port their code to different platforms) have spawned other implementations which are much more up to date and robust than the Lancaster University implementation. In our MIPv6 testbed for 6NET we have thus not considered the Lancaster University implementation since it is now not interoperable with more recent implementations.