Counting IPv6 in the DNS

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At the recent ARIN XXX meeting in October 2012 I listened to a debate on a policy proposal concerning the reservation of a pool of IPv4 addresses to address critical infrastructure. The term "critical infrastructure" is intended to cover a variety of applications, including use by public Internet Exchanges and authoritative name servers for various top level domains. As far as I can tell, the assumptions behind this policy proposal includes the assumption that a top level authoritative name server will need to use IPv4 for the foreseeable future, so that an explicit reserved pool of these IPv4 addresses needs to be maintained for use by the authoritative name servers for these domain names.