Why does my nameserver IP not update?

Question

I have a zone with a nameserver in it.  Let's call it testzone.tld with a nameserver of ns1.testzone.tld.   I've updated the zone file to change the IP addresss of ns1.testzone.tld but it does not update when I used dig.  I've restarted the nameserver and everything.  What am I doing wrong?

Answer

It's likely that there is a second zone file just for ns1.testzone.tld.  Move it out of /var/named/ and rebuild /etc/named.conf with the following script:

/scripts/rebuilddnsconfig

 This will also restart the nameserver.

Now it should work!