Dear all, how about this (thanks to Henk): Definition: A physical network infrastructure (layer 2) operated by a single entity with the purpose to facilitate the exchange of Internet traffic between Internet service providers. The number of Internet Service providers connected should at least be three and there must be a clear and open policy for others to join. Addresses needed for other purposes (e.g. additional services provided to the members) should be assigned by upstream ISPs. Assignment size: - a /48 in most cases - a /64 if it is known that there will only be one subnet (basically following the IAB recommendation) Additional warning: The RIRs should warn the IXP that it is strongly discouraged to announce the addresses and that they will likely not to be globally routable. If this is agreeable the RIPE NCC will implement this policy and co-ordinate it with the other Regional Internet Registries. Mirjam Kuehne RIPE NCC