In article <mailman.812.1463666011.73610.bind-us...@lists.isc.org>,
Matus UHLAR - fantomas <uh...@fantomas.sk> wrote:
often a problem of invalid NS delegation, or bad TTL (A record for a server
expires before NS record).

On 19.05.16 15:31, Sam Wilson wrote:
Glue A records for the nameservers have 172800 TTL, authoritative A
records have 1200.

that's it!

;; ANSWER SECTION:
colostate.edu.          3600    IN      NS      dns3.colostate.edu.
colostate.edu.          3600    IN      NS      dns1.colostate.edu.

;; ADDITIONAL SECTION:
dns3.colostate.edu.     1200    IN      A       129.82.103.111
dns1.colostate.edu.     1200    IN      A       129.82.103.121

after 1200 seconds, the A records expire, but the NS records don't.

Next 2400 seconds you know that you have to ask dns3.colostate.edu and
dns1.colostate.edu, but you can't find their IPs, because ...  you don't
know their IPs.

while some DNS servers can cope with that, it's still broken setup.

On 24.05.16 11:14, Thomas Schulz wrote:
Our server here running BIND 9.10.3-P4 seems to handle it OK. Do some
versions of Bind work with this broken setup while other versions do
not? I wonder what versions of Bind are running on the two servers
that do work and what versions on the two that do not.

I can't tell you under what circumstances it works and when it doesn't.
I can only repeat that this setup is broken and why.

There's no point of complaining before it's fixed, it's just ranting:
"I have broken setup and it doesn't work on some servers..."


--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
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