Search Again: Re: Just noticed this, is is a problem? From: Len Conrad Date: Saturday, October 6, 2001 Time: 6:55:38 am >No, I'm talking about the fact that the animeigo.com query returns a SOA, >but the selfpromotion.com query didn't. hmm, I've just noticed that, too, and for other domains. dig domain.com any ... returns only the delegation data (ie, as if we were querying @zone.parent.ns) but dig @auth.ns domain.com any ... returns all records owned by domain.com. ok, let's "think" :))) When querying the default NS which has no records cached for domain.com, then the default NS will query the .com parent that returns the delegation data in a "referral" (which is NOT technically an "answer") and which is the only "any" record that the zone parent has. the default NS is satisfied with the referral as "ANY" and does not query the auth NS's for their ANY answers. but querying @auth.ns will get all the full set of "any" records. >Question: does OT round-robin the dns servers listed in the TCP/IP control >panel or try them in order of priority. there is no "priority" among NS records. the answering NS will return the elements of the NS "RRset" in a physical order according to how that NS has been setup to order the elements in the RRset. (BIND has: cyclic, random, zone-physical order) non-DNS resolvers (eg, Windows resolvers) will query the NS's in the physical order in resolver params. BIND resolvers will use an RTT, round-trip-time, to home in, continuously, to the whichever NS is answering with lowest RTT. >If the former, that is the probable cause of the anomaly since I have >several dns servers listed in my "office" configuration (which I used to >do the tests) Those NS's will be queried in the physical order they are listed in the local machine's resolver settings. Len Men & Mice: QuickDNS - DNS Expert - DNS Training - DNS Consulting DNS Classes: Newark Sep 27-28, Toronto Oct 18-19, Frankfurt Nov 21-23, London Nov. 26-28, Maidenhead Oct 31-Nov 2 http://MenAndMice.com/DNS-training

Messages In This Thread: Just noticed this, is is a problem? by Robert J. Woodhead (AnimEigo) on Oct 5, 2001 at 8:12:29 am Re: Just noticed this, is is a problem? by Men & Mice Support on Oct 5, 2001 at 8:54:51 am Re: Just noticed this, is is a problem? by Robert J. Woodhead (AnimEigo) on Oct 6, 2001 at 6:27:22 am Re: Just noticed this, is is a problem? by Len Conrad on Oct 6, 2001 at 6:55:38 am Re: Just noticed this, is is a problem? by Men & Mice Support on Oct 6, 2001 at 8:46:01 am