[apologies for duplicates] Dear colleagues, In an earlier article on RIPE Labs, we showed that a large percentage of 6to4 connections fail. In this new article by Emile Aben, we look at why these connections fail and what can be done about this: http://labs.ripe.net/Members/emileaben/6to4-why-is-it-so-bad Kind Regards, Mirjam Kuehne RIPE NCC