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Re: [DNSOP] Anycast and DNS questions

Tony Finch <dot@dotat.at> Wed, 06 August 2014 13:18 UTC

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Date: Wed, 06 Aug 2014 14:18:11 +0100
From: Tony Finch <dot@dotat.at>
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To: Toerless Eckert <eckert@cisco.com>
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Subject: Re: [DNSOP] Anycast and DNS questions
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Toerless Eckert <eckert@cisco.com> wrote:
>
> Is it fair to say that DNS would be the prime reason for anycast addresses
> injected into the global BGP routing table ?

There is also a lot of anycast for HTTP servers. I don't know what its
relative popularity is compared to DNS.

Another example is 6to4, though it isn't a shining success story.

> The way i read RFC3258 it sounded as if every individual root server could
> use its own anycast address across its own set of disperse DNS servers. But
> i could see no indication that specific anycast addresses where assigned to be
> used by root servers run in different organizations.

Correct. The closest it gets is the fairly liberal co-location done by
L-root.

As I understand it, CommunityDNS does a similar thing, and they provide
secondary service to a number of TLDs.
http://www.communitydns.eu/pdf/Slave_Server_Spec.pdf

Tony.
-- 
f.anthony.n.finch  <dot@dotat.at>  http://dotat.at/
Irish Sea: West or southwest, veering northwest for a time, 4 or 5,
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