[dns-operations] anycasting axfr

Moritz Muller moritz.muller at sidn.nl
Wed Apr 19 09:37:36 UTC 2017

There is also a technical report that looks at the anycast (in-) stability using root servers.


Overall, it looks stable enough to perform AXFRs.


> On 19 Apr 2017, at 10:32, Anand Buddhdev <anandb at ripe.net> wrote:
> On 19/04/2017 09:58, Anand Buddhdev wrote:
>> The fastest AXFR took 3.3s, while the slowest took 62.5s.
> Someone just asked me privately about why even the fastest AXFR took as
> long as 3.3 seconds, while using dig shows faster transfers. I had
> forgotten to mention that I performed my analysis using a python script
> and the dnspython module, which is terribly slow at constructing a zone
> object from an AXFR. Real-life transfers between the root name servers
> and dig (or another regular name server as client) will be far faster.
> Regards,
> Anand
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