On Aug 6, 2014, at 5:10 AM, Patrick W. Gilmore <patr...@ianai.net> wrote: >> c) Any example in which the DNS servers utilizing a single shared >> IP address (anycast address) are run by different operators ? > > How about the root servers?
Err, no. Each of the IP addresses of the DNS servers serving the root have a single operator (not different operators). Well, OK, there have been cases where more than one operator was announcing the same root server address (e.g., http://blog.icann.org/2008/05/ghosts-of-root-servers-past/, http://www.renesys.com/2010/06/two-strikes-i-root/), but those cases are considered abominations. There have been multiple proposals to do the multiple operator on a single anycast IP address approach, but my impression has been that concerns about debugging those implementations have discouraged their use. Regards, -drc
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