Hello Anand, Thanks for the response.
> > Perhaps the zone got updated between your queries. > > Have you (as one should in a proper experiment) repeated these queries > to demonstrate that this is happening consistently? > Yes, it is a consistent behaviour. It happens with some of our secondaries. for example: dig +tcp @212.26.18.3 pub.sa serial: 2017061804 dig +notcp @212.26.18.3 pub.sa serial: 2017061805 > If it is happening consistently, then it's possible that you have *two* > DNS servers listening on the server, one on the UDP socket, and another > on the TCP socket, and they're loaded with different zones. > To my understanding, they are running bind with one configuration. Will double check anyway. thanks, arun
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