No A Record for NS

[Bind DNS]

On Fri, 20 Mar 2009 15:57:03 +1100
Mark Andrews <Mark_Andrews at isc.org> wrote:

> > I'm trying to query for A record, like this :
> > # dig @a.gtld-servers.net ns1.ats-com.com +short
> > 203.130.232.235
> > 
> > # dig @203.130.232.235 ns1.ats-com.com +short
> > (No A Record)
> > 
> > What is happen if that NS be used for authoritative some domain(s) ?
> 
> 	Things break once the nameserver learn that the authoritative
> 	servers for the zone don't have address records.


Could you explain the query results, below : (Two Cache DNS, with different
results)

 # dig www.ats-com.com @222.124.204.34

; <<>> DiG 9.4.1-P1 <<>> www.ats-com.com @222.124.204.34
; (1 server found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 2091
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.ats-com.com.               IN      A

;; Query time: 6 msec
;; SERVER: 222.124.204.34#53(222.124.204.34)
;; WHEN: Fri Mar 20 15:14:45 2009
;; MSG SIZE  rcvd: 33

 # dig www.ats-com.com @202.134.1.10

; <<>> DiG 9.4.1-P1 <<>> www.ats-com.com @202.134.1.10
; (1 server found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 45331
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 2, ADDITIONAL: 1

;; QUESTION SECTION:
;www.ats-com.com.               IN      A

;; ANSWER SECTION:
www.ats-com.com.        3108    IN      CNAME   ats-com.com.
ats-com.com.            745     IN      A       203.130.232.235

;; AUTHORITY SECTION:
ats-com.com.            745     IN      NS      ns2.ats-com.com.
ats-com.com.            745     IN      NS      ns1.ats-com.com.

;; ADDITIONAL SECTION:
ns2.ats-com.com.        2337    IN      A       203.130.232.235

;; Query time: 11 msec
;; SERVER: 202.134.1.10#53(202.134.1.10)
;; WHEN: Fri Mar 20 15:22:36 2009
;; MSG SIZE  rcvd: 115

Is it possible if the information for A record (ns1.ats-com.com) get from the NS
parent ? 

Which the problem ? (cache dns or the domain)

Thank You.
----------
Senmi <sendme at telkom.net.id>