TTL not decreasing on slave servers

Mariano Cunietti mcunietti at enter.it
Thu Jul 21 17:57:27 UTC 2005


Hi list,
I've set up one master DNS (Bind 9.2.3) on a private IP and two public
slave DNS (Bind 9.2.3).
Zone transfers are OK, but I have problems when it comes to change a
zone file. I increase the serial number on the master, and then all
notifies are sent correctly. Zones are transfered, but if I query the
slaves I always get the same maximum TTL per record, and record values
are not updated as well.

Example:

# dig www.fondazionearnone.it

; <<>> DiG 9.2.3 <<>> www.fondazionearnone.it
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 25184
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 3, ADDITIONAL: 3

;; QUESTION SECTION:
;www.fondazionearnone.it.       IN      A

;; ANSWER SECTION:
www.fondazionearnone.it. 86400  IN      A       82.191.235.236

;; AUTHORITY SECTION:
fondazionearnone.it.    86400   IN      NS      dexter.enter.it.
fondazionearnone.it.    86400   IN      NS      dante.enter.it.

;; ADDITIONAL SECTION:
dns2.nic.it.            85781   IN      A       193.205.245.8
dante.enter.it.         86400   IN      A       212.29.129.2
dexter.enter.it.        86400   IN      A       212.29.129.3

;; Query time: 3 msec
;; SERVER: 212.29.129.3#53(212.29.129.3)
;; WHEN: Thu Jul 21 19:50:23 2005
;; MSG SIZE  rcvd: 175


and then a few seconds later:

# dig www.fondazionearnone.it

; <<>> DiG 9.2.3 <<>> www.fondazionearnone.it
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 40412
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 3, ADDITIONAL: 3

;; QUESTION SECTION:
;www.fondazionearnone.it.       IN      A

;; ANSWER SECTION:
www.fondazionearnone.it. 86400  IN      A       82.191.235.236

;; AUTHORITY SECTION:
fondazionearnone.it.    86400   IN      NS      dante.enter.it.
fondazionearnone.it.    86400   IN      NS      dexter.enter.it.

;; ADDITIONAL SECTION:
dante.enter.it.         86400   IN      A       212.29.129.2
dexter.enter.it.        86400   IN      A       212.29.129.3

;; Query time: 3 msec
;; SERVER: 212.29.129.3#53(212.29.129.3)
;; WHEN: Thu Jul 21 19:53:53 2005
;; MSG SIZE  rcvd: 175

$TTL is set to 86400 on every zone (1200 zones) and for each record
(12000 records)
Can anybody point me to the right clue?
TIA

Mariano
-- 
-------------------------
Mariano Cunietti
System Administrator
Enter S.r.l.
Via  Stefanardo da Vimercate, 28
20128 - Milano - Italy
Tel.  +39 02 25514319
Fax   +39 02 25514303
mcunietti at enter.it
www.enter.it - www.enterpoint.it
---------------------------
Gruppo Y2K - www.gruppoy2k.it



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