In message <503bf723.6030...@jonesmail.me>, Russell Jones writes:
> Bind 9.7 on CentOS 6.2
>
>
> Hi all,
>
> I am attempting to recreate a failure scenario of a slave server that
> cannot contact its master for a zone. I am having a difficult time
> following the log entries of what is occurring due to Bind not seemingly
> following the SOA definitions for the zone. I have the following set on
> this test zone:
>
> example.com IN SOA dns1.example.com. root.dns1.example.com. (
> 2012071914 ; serial
> 60 ; refresh (1 minute)
> 30 ; retry (30 seconds)
> 120 ; expire (2 minutes)
> 86400 ; minimum (1 day)
> )
>
>
>
> I am running into the following issues:
>
> * The refresh time seems to be ignored. Even though it is set at 60
> seconds, it seemed to poll the master server somewhere between 3 and
> 5 minutes. I had to define max and min refresh time in
> /etc/named.conf to get it to respect this time. Is there some
> internal limit to how low of a setting Bind will allow in some of
> the SOA definitions? I was unable to find a minimum limit for this
> when Googling :-)
The limits are set to sane default values and are documented in
the BIND 9 Administrators Reference Manual.
{min,max}-{retry,refresh}
> * I am seeing the following messages when it fails to contact the
> master (as expected). Only problem is after it sends this message I
> am not seeing an attempt to contact the master every 30 seconds as I
> am interpreting the "retry" limit to mean:
> o zone example.com/IN: refresh: retry limit for master
> 10.32.69.1#53 exceeded (source 0.0.0.0#0)
>
>
> Am I misunderstanding what Bind will log and attempt to do with the
> "retry" limit?
>
> Is there any documentation outlining what will actually occur, and when,
> with a slave server when it cannot contact a zone's master for updates?
It will keep retrying to refresh the zone forever. It will stop
serving the zone when the expire timer triggers if it can't refresh
the zone.
> Thanks!
--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org
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