[dns-operations] TCP anycast was Re: DNS query logging

Tony Finch dot at dotat.at
Sat Mar 19 00:27:54 UTC 2011


On 18 Mar 2011, at 23:33, Francis Dupont <Francis.Dupont at fdupont.fr> wrote:
> 
> => in fact you missed another case: I saw only once anycast leading
> to a broken service:
> - a load-balancer was in front of a pool of (two) servers
> - the load-balancer became a bit bad and duplicated packets,
>  i.e., sent incoming packets to both servers in place of selecting
>  on at the first packet of a flow and keeping it
> - TCP queries failed in a strange way getting both answers and TCP
>  resets
> - the load-balancer was rebooted
> and the service has been worked pretty well since many years...

A load balancer does not implement anycast.

Tony.
--
f.anthony.n.finch  <dot at dotat.at>  http://dotat.at/


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