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[DNSOP] Anycast and DNS questions

Toerless Eckert <eckert@cisco.com> Wed, 06 August 2014 11:48 UTC

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Date: Wed, 06 Aug 2014 04:47:59 -0700
From: Toerless Eckert <eckert@cisco.com>
To: dnsop@ietf.org
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Subject: [DNSOP] Anycast and DNS questions
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Sorry, haven't been following this group for a long time, so
please excuse if answers to these questions have been discussed in before:

a) What documents beside RFC3258  are describing any uses/procedures
   for having DNS servers use an anycast address to receive and respond to
   requests ?

b) How common are deployments in which the information returned by different
   anycast member DNS servers for the same query would be different,
   aka: to "localize" lookup results, such as pointing to
   local CDN caches or the like ? What would be the most well known examples
   of such deployed instances ?  Any IETF documents describing this ? Any
   rules to follow ?

c) Any example in which the DNS servers utilizing a single shared
   IP address (anycast address) are run by different operators ? Any
   documents describing this ? (RFC3258 seems to focus on single operator
   anycast group of DNS servers.

Thanks
    Toerless

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