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Re: [DNSOP] Anycast and DNS questions

David Conrad <drc@virtualized.org> Thu, 07 August 2014 01:16 UTC

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From: David Conrad <drc@virtualized.org>
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Date: Wed, 06 Aug 2014 18:16:23 -0700
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References: <20140806114759.GF5546@cisco.com> <25907D96-0076-417A-8DB9-41A5A178D479@ianai.net>
To: "Patrick W. Gilmore" <patrick@ianai.net>
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Cc: "dnsop@ietf.org" <dnsop@ietf.org>
Subject: Re: [DNSOP] Anycast and DNS questions
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On Aug 6, 2014, at 5:10 AM, Patrick W. Gilmore <patrick@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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