Moving 6to4 to historic does not in any way impact your ability to use it as you wish. 6to4 support is not part of the IPv6 node requirements, as I understand it. Therefore I believe that any vendor (OS, router, otherwise) could deleted 6to4 support in any release and be in violation of anything, regardless of historic status. _______________________________________________ Ietf mailing list Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf