Open 6to4 relay router operation

Abstract

A method called 6to4 enables separate IPv6 sites to connect to the IPv6 Internet via a 6to4 relay router without an explicit IPv6 over IPv4 tunnel setup. There are currently about ten open 6to4 relay routers worldwide but none of these had been installed in Japan. We therefore decided to evaluate 6to4 technology and set ourselves the goal of improving 6to4 operation within Japan. To accomplish this, in March 2002, we installed an open 6to4 relay router within Japan with the cooperation of the WIDE Project and started this experiment. This paper describes our experiment and reports statistical information acquired in operation as well as problems during operation.