Re: why this query cause ServFail

2016-09-10 Thread Hillary Nelson
I've double checked our nameserver config and there shouldn't be any stub involved when resolving this domain, we don't have forwarder configured. After flush the cache or the cache expires itself(the ttl is short), bind almost always hit another server and works, we have 9 named resolvers, anytim

Re: why this query cause ServFail

2016-09-10 Thread John Miller
Hillary, I suspect there's more going on behind the scenes than just what your tcpdump shows here. Can you please post your named.conf file so we can all see if there are any forwarders, stub zones, etc. involved here? Second thing: after you flush your cache, does the same behavior persist, or

Fwd: why this query cause ServFail

2016-09-10 Thread Hillary Nelson
Thanks John, I've changed the resolver-query-timeout from default 10 to 30 seconds thought my nameserver should have enough time to query at least one other nameservers of production.tacc.utexas.edu before gets timed out. But still it stuck with the one that's not working instead of trying other na