On Fri, Mar 02, 2012 at 09:56:40AM -0800,
 Eric Osterweil <eosterw...@verisign.com> wrote 
 a message of 61 lines which said:

> We have resurrected our draft Improving DNS Service Availability by
> Using Long TTL Values, 

> A.1.  Frequency of Infra-RR Changes

A very interesting survey. Thanks for the data. But it works only for
zones who plan their NS change in advance (like most TLDs). For Joe
Smith or Jane Jones, holders of example.com, it won't help because,
although the NS changes are infrequent, they are typically not planned
in advance and the user would like them to be fast. 

I suspect that, if ordinary user's domains in .com adopt the 7-days
TTL, many will be surprised the first time they attempt to change the
NS set.

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