Re: named.conf restored to hint zone for the root by default

> Date: Thu, 2 Aug 2007 22:42:47 +0200 (CEST)
> From: Oliver Fromme <olli_at_lurza.secnetix.de>
> Sender: owner-freebsd-stable_at_freebsd.org
> 
> Hi,
> 
> Just for the record, I like the current solution, i.e.
> default being a "hint" zone, and slave zones being
> commented out, ready to be used for those who know
> what they're doing.
> 
> However, I noticed that the "refresh" interval of the
> root zone is 1800, i.e. it would be fetched every 30
> minutes, even though the zone seems to be updated at
> most once per day.  Therefore, wouldn't it make sense
> to add the following option to the slave zones?
> 
>         min-refresh-time 86400;
> 

Once again...refesh is not the time between zone transfers. It is the
time between serial number checks on the root SOA. Only if the SOA
differs is the zone transferred.

The SOA queries to root (one per DNS server every half hour) is not an
issue according to Paul Vixie.

Also, the root zone is updated twice a day, every day (at least to the
extent of a serial number bump) whether it is needed or not. Forcing the
minimum refresh to once a day could delay the recognition of a new zone
for up to a day and that is not a good thing.
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman_at_es.net			Phone: +1 510 486-8634
Key fingerprint:059B 2DDF 031C 9BA3 14A4  EADA 927D EBB3 987B 3751
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman_at_es.net			Phone: +1 510 486-8634
Key fingerprint:059B 2DDF 031C 9BA3 14A4  EADA 927D EBB3 987B 3751