[dns-operations] Root operators.. issues coming from

bert hubert bert.hubert at netherlabs.nl
Sat Jun 26 21:57:17 UTC 2010

On Sat, Jun 26, 2010 at 03:54:37PM -0400, Bob Paolucci wrote:
> The Rogers Communications Engineering group has recieved a complaint from .CA root operators that our resolvers are flooding them with queries.
> When we looked at some snoops from our dns servers regarding domains the
> root operator said we were sending multiple queries for, we saw a number
> of the domains with NS records that had longer TTL's than the
> corresponding glue in .ca causing glue to expire before the NS records, of
> course causing issue.


You may want to talk to the authors of your resolver software. They are in
the best position to study what is going on - short of networking issues.

The scenario as you describe does not sound like a likely cause of your
problem - perhaps something else is going on.

A networking issue might mean that your servers simply have a hard time
receiving answers from the .ca servers, and repeating queries a lot.


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