More than half top-level domains not really on top of IPv6
31 Jul 2009
At the recent ISOC Asia conference in Kuala Lumpur a rather innocuous coffee break question was raised: could any one around the table name some of the major Top-Level Domains (TLDs) still delinquent in their IPv6 support? Nobody could answer on the spot but the question intrigued me.
A logical place to start looking for an answer was ICANN. Their Kim Davies provided a rather revealing perspective in a presentation at ICANN 34 in april. 41% of the 280 existing TLDs did not provide any IPv6 connectivity and more than 68% did without any diversity. Even for IPv4 it was surprising to see that 7.2% of TLDs do not provide diversity, contrary to IANA rules. Two name servers separated by geography and topology are required and the same applies for IPv6 (gTLD applicant guidebook).
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