In article <mailman.2610.1396955773.20661.bind-us...@lists.isc.org>, Joseph S D Yao <j...@tux.org> wrote:
> On 2014-04-08 06:08, Bryan Harris wrote: > > ... > > The current mechanism is to put the Windows AD server into the > > resolv.conf BEFORE the BIND servers, since, as has been explained to > > me a Linux server will perform a query against all three > > simultaneously (that doesnât immediately ring true to me, itâs just > > what I was told). ... > ... > > > You were told wrong about "simultaneously" from /etc/resolv.conf. It > uses the first one that gives an answer. If the first one times out, it > asks the next and ignores any response from the first, etc. (If you > think about it, what happens if two "simultaneously" respond with > different answers? If one never responds?) ... Novell's LAN Workplace for DOS used to do simultaneous queries to however many (max 3 IIRC) servers you put in its RESOLV.CFG. I've never seen it happen on a *ix/*ux box. I can't remember if the slower servers received port unreachables when their answers trailed in behind the leader. Sam -- The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.
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