No longer true. named picks the 'nearest' one, based on SRTT. Non-responding forwarders are penalised via a very large SRTT.
https://lists.isc.org/mailman/htdig/bind-users/2010-April/079556.html Dangl, Thomas wrote: > Hello, > > when we have a zone with type forward and a forwarders list with > multiple entries, which strategy is used by Bind9.7? > I found some information in the DNS and Bind book by O Reilly and the > identical statement on the Internet and FAQs saying > There was a Bind8.2.3 that had applied an intelligent behavior > evaluating roundtrip times of forwarded queries and used the name server > that provided the fatsest response. > For Bind9 it is stated that simply the first entry in the forwarders > list is used and if this first one fails to respond, the next in the > forwarders statement is tried and so on. > I understand the description in the way that this also applies when the > first entry in the forwarders list is not responding at all. The next > forwarding for the zone would still start with trying the first entry in > the forwarders list. > > Is this still correct with Bind 9.7 (more precisely Bind9.7.1 / > Bind9.7.1-P1 / Bind9.7.1-P2)? > > > Best regards > > Thomas Dangl > > > > ------------------------------------------------------------------------ > > _______________________________________________ > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users _______________________________________________ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users