Two RFC2317 Questions

[Will Yardley]

In article <a921bg$9o1 at pub3.rc.vix.com>, Barry Margolin wrote:
 
> Notice that dig defaults to querying for an A record.
> 
> When I specify PTR I get the expected result:
> 
> % dig -x 216.60.241.0.17 ptr
> 
> ; <<>> DiG 8.3 <<>> -x ptr 
> ;; res options: init recurs defnam dnsrch
> ;; got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 6, ADDITIONAL: 8
> ;; QUERY SECTION:
> ;;	17.0.241.60.216.in-addr.arpa, type = PTR, class = IN
> 
> ;; ANSWER SECTION:
> 17.0.241.60.216.in-addr.arpa.  23h59m21s IN PTR  csgax.able.anl.gov.

bind9 dig will follow the CNAME:
(9.3 snapshot doesn't even show the cname, although i think 9.2 dig
shows both).

jazz% dig -x 216.60.241.0.17

; <<>> DiG 9.3.0s20020328 <<>> -x 216.60.241.0.17
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 33951
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 6, ADDITIONAL: 0

;; QUESTION SECTION:
;17.0.241.60.216.in-addr.arpa.  IN      PTR

;; ANSWER SECTION:
17.0.241.60.216.in-addr.arpa. 86400 IN  PTR     csgax.able.anl.gov.

;; AUTHORITY SECTION:
0.241.60.216.in-addr.arpa. 86400 IN     NS      dns2.anl.gov.
0.241.60.216.in-addr.arpa. 86400 IN     NS      ns1.swbell.net.
0.241.60.216.in-addr.arpa. 86400 IN     NS      ns2.es.net.
0.241.60.216.in-addr.arpa. 86400 IN     NS      ns2.swbell.net.
0.241.60.216.in-addr.arpa. 86400 IN     NS      nsx.lbl.gov.
0.241.60.216.in-addr.arpa. 86400 IN     NS      dns1.anl.gov.

;; Query time: 902 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed Apr 10 19:08:59 2002
;; MSG SIZE  rcvd: 205

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