On 19-Feb-2019 20:00 CET, <josh....@gmail.com> wrote: > Agree with Tony on TCP not going to be tried. Have you looked at using > anycast? It is not true load balancing but it allows you to stand up > multiple DNS servers that “shares” a single IP address.
or just use a software load-balancer which has been designed to deal specifically with DNS, i.e. dnsdist - as mentioned by Tony already :) -- Nico > On Wed, Feb 20, 2019 at 12:25 AM Tony Finch <d...@dotat.at> wrote: > > > Roberto Carna <robertocarn...@gmail.com> wrote: > > > > > Dear, I have to balance two DNS servers for a special reason. > > > > https://www.powerdns.com/dnsdist.html > > > > > The DNS clients are a mix of Windows, Cisco and Linux machines, so I > > > think they ask for a FQDN using UDP and after that -if there is no > > > response-, they ask the same FQDN using TCP, and so the load balancing > > > will be succesful. > > > > No, fallback to TCP relies on receiving a truncated UDP response. You > > never want a DNS client to be waiting around for a response that will > > not arrive. > > > > Tony. > > -- > > f.anthony.n.finch <d...@dotat.at> http://dotat.at/ > > Rockall, Malin: Southeast veering southwest 6 to gale 8, occasionally 5 > > later. > > Rough or very rough. Rain. Moderate or poor. > > _______________________________________________ > > Please visit https://lists.isc.org/mailman/listinfo/bind-users to > > unsubscribe from this list > > > > bind-users mailing list > > bind-users@lists.isc.org > > https://lists.isc.org/mailman/listinfo/bind-users > > > _______________________________________________ > Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe > from this list > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
