In message <!&!AAAAAAAAAAAuAAAAAAAAAKTyXRN5/+lGvU59a+P7CFMBAN6gY+ZG84BMpVQcAbDh
1IQAAAATbSgAABAAAAA4S92p8rHuQbWoH1A8YNv/aqaaa...@iname.com>, "Frank Bulk" write
s:
> Wow, I wasn't aware of that nuance. I have been making incorrect
> assumptions.
>
> It doesn't make sense to me how DNS3.UIOWA.EDU can return the correct cached
> result for the NS records of sioux-center.k12.ia.us but an incorrect "norec"
> result. Doesn't specifying "no recursion" mean that it has to be either
> authoritative for that domain or have the entry cached in order to return
> any result at all?
No. It is a server for a parent domain so it returns a referral
to where the real information is.
> But the 'aa' bit is not set, which seems to me that it
> must have obtained the result from its cache.
Note there is nothing in the answer section to set "aa=1"
against.
; <<>> DiG 9.3.6-P1 <<>> +norec sioux-center.k12.ia.us ns @DNS3.UIOWA.EDU
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8795
;; flags: qr ra; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 1
;; QUESTION SECTION:
;sioux-center.k12.ia.us. IN NS
;; AUTHORITY SECTION:
sioux-center.k12.ia.us. 28800 IN NS dns.mtcnet.net.
sioux-center.k12.ia.us. 28800 IN NS ns1.netins.net.
;; ADDITIONAL SECTION:
ns1.netins.net. 61323 IN A 167.142.225.5
;; Query time: 223 msec
;; SERVER: 128.255.1.8#53(128.255.1.8)
;; WHEN: Sun May 17 07:48:51 2009
;; MSG SIZE rcvd: 109
--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: mark_andr...@isc.org
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